I'd be curious how you would do with a split more like mine. It's just a little bit more volume than your accustom to, but I think it would help you tighten up a little bit more. Right now I'm on a Chest/Shoulder/Tris, Back/Bis/Abs, Leg/Abs split. It's generally 1 compound for 3-4 sets and more of an isolation for 3-4 sets for Chest/Shoulders and then 3 sets for Tris. Back width 3-4 sets, Back thickness 3-4 sets, and 3 sets for Bis. Legs are normally 6 sets for quads and 3 for hammy's and whatever else you'd like for calves.
You should consider it or something like it.