As an individual: you are right we barely make a dent in their bottom line and it would indeed be deluded to expect them to listen to our concerns.
As the community in general: we ARE their income. There would be no FF-XIV w/o us and they would be out of a job.
So it is prudent for any game developer to keep an ear to the community and realize when there is some kind of consensus on issues.
One example would be the culling of objects that does not follow a strict priority like MOBS = PARTY MEMBERS = TARGET = FOCUS TARGET [these are always visible] >>>> random players of other groups (can be culled to improve performance) and instead makes the dude you just targeted or the boss disappear in front of you.
SE'd do well to heed our "feedback" in that regard.
The way I know SE though, instead of fixing lazy coding, they'll probably try to think of a way how to make fate trains not happen in EUREKAs next zone. >.<