Ballou showed last season that he can be effective in Segunda. I do not know if he will play much at Albacete but given that he is out of the starting 11 in Barcelona B currently, this is a smart last minute move.
The kid from Getafe (sorry do not know his name off my head) seems decent enough to cover Ballou absence, while it could work out beneficially that Gabriel is staying and will be available end of season. He doesn't seem anything special either, but a "killer" in the box always works well at these levels (Cardona, Soriano and others I'm too lazy to research but I know we had).
As for Ballou. Effective player, lacks overall team play and will more than likely never make it here. He reminds me of Jeffren with a similar potential level.