Hey buddy. Recently I've had some similar thoughts about 5/3/1. My strategy for picking a new program was simple: I thought about what I need to get bigger and stronger, and it's incredibly straightforward.
1) I need to do the big movements, really heavy
2) I need to do the big movements for a lot of lighter reps with beautiful technique and speed
3) I need to do assistance movements to build up my big movements
4) I need to do some conditioning.
Those are pretty much the only things that matter, when it comes right down to it. So, I came up with this really simple plan
Heavy lower body (or max effort, same thing really)
Heavy upper body
Rep lower body
Rep upper body
After each main lift, just do whatever assistance you need to. It's a pretty basic plan, but you can utilize a lot of the westside stuff you've been doing, and place more emphasis on conditioning if you really want to take off some pounds. And simple is almost always better.