oh yea. def. The 2.4 stuff is so nice, and it makes it safer too. i dunno if you need new servos, but 4 AAs in a batt back isnt much when you driven something that is fast and has some weight to it, just not enough juice to hold the forces. Good servos make wonders, but not a MUST have item if you arent racing.
If u are racing, i would say buy the baddest steering servo you can find, good radio and set it up right.