I've noticed that some tracked vehicles really lack grip and they are very hard to drive cross country. MTLB has worse characteristics than it used to have, BMP3 grip is bad, and Warrior is the worst. Reason is most likely reduced grip/weight of the vehicles. For example in Fools Road it's almost impossible to climb hills with the Warrior as the grip is nonexistant, and the vehicle also bounces of the trees which it hits them like it has no mass whatsoever. Also yesterday my Warrior immobilized in Al Basrah, and whenever trying to reverse or drive forward, the vehicle would continue to move itself on the same direction, without me needing to use any control inputs anymore. It even drove itself up a hill while immobilized, when I wasn't pressing any buttons.
IMO IFVs need more grip as tracked vehicles IRL have the best cross country abilities, not wheeled vehicles like right now in PR.