They should make Vansaar different for the cancel Leader thing. if you have leaders to level up, Vansaar should be able to help them. but, then multiple vansaars could be used for extra exp.
I just thought of something! make it so leaders don't cancel bonus until they are maxed. they don't have abilities until level 5 so why should a deck with Vansaar and a not maxed Leader cancel the +exp ability?