I'm playing through the campaign now (1/2025) in the SU-25 non-T.
The countermeasures load was not adjusted to the "new" CM system (you start with 90-ish, instead of 250-ish). This is not a big issue.
What actually bothers me the most is that your teammates (AI planes, mostly fellow SU-25s and Mig-23/27s) are complete retards.
They declare attacking SAM-s, some actually manage to get into position but do not fire a weapon. Flies away and gets roasted. One after another.
...
A flight of 6-8 Su-25s get shredded by a single Gepard (yes, they are dangerous, but still...), no one reacts or seems to care. The flight gets shot down in 1 minute.
Does not impair the player progress in any way, but the immersion is destroyed. Yes, the Soviet doctrine was as it was, but this is just the AI bugging out, having nothing to do with the grand battleplan.
I know it's an old campaign, but being so bugged out is just like watching DCS dying a slow and inevitable death.