Like Brian said "Wow" Thats a lot of meds. I was on lots of oral meds and the lizard stuff also but when I started insulin metformin was the only other med I took and after I started on MDI I stopped that also.
MDI using long acting basal insulin (Lantus, Levemir) and short acting bolus insulin (Novolog, Humalog) at meals would probally be a good choice. It does required the testing and carb counting that Brian mentioned but it's worth it.
The only reason I can see for continuing Byetta would be for the weight loss that it can bring. Usually this weight loss effect is short lived anyway, that's the reason I stopped it.