Having the same issue with a brand new system and RTX 2070. Before patch it was smooth without any fps-drops, now it's unplayable at 30 fps and sometimes even lower in stations. It also seems to get worse when entering the left and right menus. Maybe there is a correlation with the reworked menus?
Are you noticing the frame-skip / lag spikes? ( I don't know to call them). They often happen when you initially bring up one of the panel menus, or the contact list updates...