Been happily running with FPS in the 60-100 range for months now. But with the 1.3.4 patch, I will sometimes get new zones that load in the teens. I can mitigate this by closing LE and Steam, then relaunching.
The zones that are most likely to die are ones with Ancient Era themes. This is happening infrequently, but enough to make playing next-to impossible. I haven’t had any major system updates lately, so I’m at a loss as to the cause.