I see a little bit of "chat lag" on Mistmoore, but certainly not enough to make it an "issue".
I got stuck in combat a couple times the other night up in Barren Sky, but not for long.
As for actual gaming lag, I've had about as much as I've ever had before, which isn't much. I've had no more issues with the broker or other items than I normally had prior to GU37, either, soooooo basically I'm not really seeing the issues the OP is talking about.