I noticed that when calling in helicopter or IED drone support, the smoke plume remains until it leaves/explodes. I would much prefer if the smoke plume disappears after the helicopter/drone has 'arrived' (perhaps gotten within 20m horizontally from the smoke plume?).
I also noticed that artillery/mortars and rocket barrages take much longer now, and I'm not really sure I like it. I preferred it when it was much shorter.