Didnt know they were about their reelase for ESSA. ORBX Bromma, ESSB, is quite heavy. Not sure if they are gonna release and update for it. Ive got their Sturup addon as well. Lets hope the ESSA version (without any speedbumps) is out soon.
I think that other big cities performs quite well (NOT Paris for me), but it could be cause of server issues as well, but I think Stockholm scenery ALWAYS performs bad.
Issues are stutter, bad framerates etc.