I recently discovered VU and I don't know how it's work (Joined few days ago), but putting C4 for Snipers will compensate a lot this class on larger maps. Because with C4 the recons doesn't need to ran kilometers (I'm Brazilian) away from a guy on a tank.
I've a lot of other ideas that is on 2nd place like:
1 - BF3 Levollutions.
2 - All and new skins for all weapons.
3 - All sights for all pistols.
4 - New maps.
5 - Weather and time conditions.
But this is for the future (hopefully) on my server. Try to just see the C4 issue.