The first enemies you see are red Hilichurls (the ones who use Pyro) and Pyro Abyss Mages, who have invaded Natlan from somewhere
I literally pointed out that the abyss order is up to shady shit to begin with in natlan with the ruins. You don't think they'd use the calamity to try and gain some kind of quick advantage? It is dumb the entire tree place didn't catch on fire or whatever but the way they show it's fallen is it it's like literally just filled with rift wolves. The way you framed it it being not portals and shit but fucking paratroopers was why i reacted like I did to your claims.
Ajaw is theone I've been able to 100% get used to because he's literally supposed to be a weird out of place thing and isn't treated as normal aside from like if people have already been awareof him for a long period of time. Was weirded out at first by his inclusion but then once I found out the reason why he exists the way he does it was a pretty neat excuse to implement that kind of thing. You're probably going to quote this again and change my text to "irrelevant stuff" or whatever but the reason ajaw is how he is is due to him being sealed with ancient pre-history vishap/dragon society tech from before they kind of collapsed society wise and eventually devolved into the current state you see them in in the various places in tevyat. Most of the advanced tech in natlan is explained away as reverse engineered ancient pre-history tech shit. I can understand the motorcycle as goofy as it is too, it's not like there haven't been things with wheels or motors before, Fontaine and Inazuma literally have hyper advanced humanoid robots that play an important part in their quest lines.
...I agree about the flying railgun being ridiculous though. it's kinda cool but absolutely retarded lore wise lmao it's not even ancient tech! it's made by another playable character in a workshop. A character that has fucking roller blades that let them skate up walls for some fucking reason.
in terms of believability with pre- established lore the natlan guys I can currently remember are ranked like this for me
1: Kachina (just a fucking drill being ridden by a kid, basic rock driller type stuff. can scale cliffs with it because it's boring into the side)
2: Kinich (Ajaw abuse, borrowing fraction of weird imprisoned spirit's power, grappling hook. basic tree tribe type shit aside from ajaw existing)
3: FUCKING MOTORCYCLE (BRRRMMBRMBRRMBRRRRRRRRM)
4: Mulani (ikea shark-eque entity surfing on air, what the fuck is this lmao. popeye ass punching animations )
5: WALL SKATER
6: GUN. FLYING GUN. FUCK AAAAAAAAUGH