Still, if you insist that series is worth it, I’ll keep Trails in the Sky in mind the next time I’m looking for a JRPG.
Based on your assessment of Cold Steel 3, I am almost positive you'll likely prefer Sky and maybe the Azure duology but Cold Steel might be a little too typical (modern) anime for you. Sky 1 and to an extent 2 a little more down to earth fantasy and most of the playable characters are generally quite small and mostly irrelevant at the start outside of their own personal bubble in the grand scheme of things. It isn't quite as on the nose about your importance as the MC of CS3. Cold Steels protagonist kind of has a bunch of development from the first two games to back him up as being important which makes no sense without the past games' knowledge.
I personally played Cold Steel 1 and 2 first before Sky, and I liked Sky a little bit more though I liked CS well enough for different reasons as far as plot and writing styles. Their are some relevant tie-ins if you don't play in order, but that doesn't really matter until 3 when they start bringing all three major arcs together. That's when you'd really ideally want to play all of them, but I think Sky 1-3 is fine by itself without a ton of sequel baiting and hooks getting in the way of a satisfactory ending.
I personally feel most JRPG games have "anime" dialogue, as I've been into anime shit for decades so I just feel most JRPGs are just anime from experience though Cold Steel leans more into some more modern anime stuff that is "controversial" to say the least. Cold Steel's school setting is actually cool because it uses the setting as sort of a cultural microcosm of the nation it takes place in. It is like a low stakes culture clash across its cast which actually uses the school setting in a way that feels novel as a vehicle for a coming of age story and isn't just some total "relive my high school days where I get all the women" fantasy stuff like say Persona feels like a lot of the time.
Still Sky is a far more traditional adventure story and is relatively more straight forward, and as a bonus it doesn't involve killing God or something comparable, so that's cool.
I hope you enjoy it if you try it out.
It has always tried something a bit different with each entry, but I do feel that it was after X that they really started to experiment. Drawing and Junctioning in VIII was certainly original, but the Guardian Forces felt like an expansion of VI’s Espers crossed with the ability to readily swap character roles afforded by VII’s Materia or III and V’s Jobs.
I actually think that the games that use the Job system aren’t all that different from those that don’t. Most Final Fantasies have offered up some fairly substantial means of customising your characters - with many allowing you to completely redefine them, sometimes at a whim. Jobs certainly define the Tactics and Bravely Default series, but their spirit is present in a lot of mainline games.
X did put a greater focus on the particular strengths of each party member, but I wouldn’t call that a big change, and the turn system basically behaved like a turned based ATB.
But afterwards you get things like an MMO as a mainline entry, an offline MMO where you automate your party’s actions, a game that with even more automation that prioritises macro strategy over micro actions, another MMO, an action RPG spinoff rebranded as a mainline entry, and an outright action game. You can still see the connections, like how Paradigms are basically Dresspheres crossed with Gambits, but the overall gameplay experience becomes very different.
I personally feel like most FF experiments make things stark enough to be different, it is why the argument of which one the best one is so hot because the games differ in key aspects and mechanics. Some people love the absolute hell out of jank games like FF8 or FF12 and could find the more "simple" games like FF9 or FF4 too boring by comparison.
For me job games differ for one reason, character feel. The fact Kain is a Dragoon, Rydia is a Summoner, and Cecil is a Paladin matters on some level to who they are and that is unchangeable. Same with Zidane being a Thief, Steiner being a knight, and Garnet/Dagger being a white mage. It defines themselves as part of a party and a cast because you can't just swap stuff around in gameplay to the point where their character identity is muddled entirely. Though I know in say FF7 for example those roles are really muddied due to how Materia works, and to an extent the same applies to FF6 even with its character specific actions like Sabin's blitzes or Terra's trance with Espers.
When Bartz can just be anything it makes him feel a little more faceless in the actual gameplay which I feel is a shame. Ramza can just be anything so the fact he's canonically a squire kind of doesn't matter as much even if I love Ramza as a character. It makes characters feel too same-y outside of cutscenes when everyone can be anything, and it also changes gameplay because you can eventually find methods to just stack up good jobs tend to occur (especially in Bravely) which can kind of makes combat feel bad when things are too same-y. It was something I actually appreciated in most of FF13's run time when each character was stuck with 3 of the 6 paradigms (until they fucked that up at the end) so your party of choice was some combination of those paradigms and you choose which roles you wanted more or less of.
While say Auron and Wakka having a set toolkit for specific uses makes them stand out more in story and in gameplay. I personally find job systems feel a lot different than non-job systems for the reason I explained, but I suppose we can agree to disagree. I just want to explain what I meant.
Maybe I'm just the type to be too "in the weeds" with mechanical changes, but to me the changes across many FF titles to me are stark even if they aren't as stark as say FF15 and the two MMOs vs everything else.
The thing with current FF vs PS2 and older FF that might I think presents these changes more starkly is more just Square Enix can't just release a good game, they need to release the biggest stupidly overly produced game ever fathomed by humankind every single release. So you just get "the next big" fantasy every 5-10 years depending on how hell the production cycle is.