I completely get that the bottleneck in MMOs is mostly going to be the CPU, but that is usually an occurrence that happens in extremely populated areas. Instanced content (dungeons/raids) is where you should be getting the best performance because it's separate from the "open world" low player count and easy to optimize since its going to be static content.
The main point being is if i'm rocking a 2080Ti or two and a CPU to match it. Getting 30fps (really 20-40) in a dungeon on literally the best hardware that money can buy right now on a game that was originally developed in 2011 is beyond unacceptable. I also get that the engine the game runs on is not the best, but if i run just about any other flashpoint at 100+fps then multiple people dropped the ball hard here. Something like this should never make it out live, its hard to enjoy any content no matter how well "thought-out" at sub par frames and massive stuttering, input lag, etc.