Grenadiers were most noticeable to me...
I think were they were very effective at punishing squads running around without cover along with helicopters hovering about, they were an effective threat, I would've liked them to remain that way, besides that, allowing cas free reign challenged only by AR/AA might not be best, and I say that as a cas whore, anyone who flies over enemies should suffer some consequence for doing so.
I didn't notice many other changes though, and voted as such.