It's absolutely not the most important, or even in the top 10 most important problems here, but it shows really illustratively how much they care about making a game which performs in an acceptable way. (which is: not that much)
Also, it's not even one or two high-poly models dragging the performance down, what I was aiming at is that the game suffers from death by a thousand cuts - the LoDs are only a part of the issue, almost every part of the game is done in a sub-optimal way. So while the UI is not a significant part of the frame time, if they fix the most glaring performance issues, they will find that there won't be a silver bullet, the game is just a pile of small performance problems all the way down.
