Right now the current rate of integration is leaving my legions side-lined for a long time, I can't really afford to take them back home either since they have to defend the newly acquired settlements, it's leading to me taking 10-15+ turns between securing my territory/replenishing my legions and advancing yet again. Personally I'd 100% be okay with this if the AI didn't blob so much, I'd be okay with turtling in Italy for 200 turns but I don't wanna end up exclusively fighting Egyptians or Thrakians when I get out, which is what I'm seeing since the Odrysions have already conquered all of Macedonia and Illyria.
I have experience with PFM if someone wants to guide me, I know I can entirely turn off the mechanic that turns every pop into a peregrinii once a city is conquered but I'd rather not do that and just look for a faster integration instead.