There's been people speedhacking in Rival Wings using the Oppressors for years with nothing done to them:
Crystalline Conflict has numerous cheat addons (like one that will make you and your teamates using the addon as well automatically unload your entire movements onto a single player on the enemy team the NANOSECOND they press their ultimate button and just completely oblierate them in a split second). THere was also a dude who infamous (a couple years ago) hacked around in CC, and was able to clip himself into the enemy base before the game would even start. IIRC he'd speedhack around the room, under the ground where he'd be untargettable, etc., and he was also streaming all of this. As I recall, he never got banned, but I could be remembering wrong.
Then there's the wintraders in Ranked PvP, which is why the same 5 names are always at the top every single season because, once you get to a high enough tier, you will be gatekept by these trannies who will throw the match if you end up in their team to knock you out of the ranking. Same kind of shit happens in Frontlines too, with mass-premades that que together and one team will deliberatley throw the match for the other.
Basically the entirety of PvP in FFXIV is fucked and nobody should even bother with it. SE never has and never will do anything about these faggots despite overwhelming evidence of what they're doing.