Why is there always a big discussion on whether Enix can code new changes/has the resources/servers will blow up? On literally everything.

If they are utterly incapable of adding new forms of interesting content that most other MMO's out there can throw in effortlessly, that's a serious issue. WoW for example is 15 years old and still manages to be miles ahead of FF14 in terms of QoL and amount of features.

Enix isn't an indie company. They screwed up 1.0 and had to beg their players to forgive them, try again and to all appearances revived the game, but if 2.0 is a game engine that actually cannot adapt or take any major update or content changes, then they didn't revive it at all. They've just painted an illusion of a revived game. The game needs to adapt to survive in coming years, we can't follow the same formula forever.