Combined Arms nerf: Never used it, don't think it has any utility besides looking good on paper. At least not in 3v3s. Haven't seen anyone use it so it's a quasi change, only for the sake of having a bigger change log
Combined Arms doesn't have any utility in 3v3? Excuse me? This is one of the best abilities in the game. Especially in teamgames where you can blob up your tanks and infantry easier. Jacksons in particular wipe the floor with anything they encounter with 65 range, fast reload and high sight range.
Though I'm personally against changing it, because I think it's fine to have these kinds of very strong abilities in the game. It takes quite a lot of work to set up and use. Another issue is that lowering the vehicle reload bonus to -15% is actually only like a -9% effective bonus, because many USF vehicles (all the open topped ones) have wind up and wind down included in their reload which do not get affected by the bonus.