Okay, I undestand it. I took a closer look at it and I have a couple concerns:
- you need more upper back exercises. I have no idea what CG PD's are. Get rid of concentration curls and add in chins. Ideally, You should be pretty close to having just as many pushing exercises (benching) as you do pulling exercises (rows,pullups) give or take 1 or so either way. That way you won't have to worry about muscle imbalances.
- You have 2 lower body days and 4 upper body days...generally. If your lower body lags, change it to 3 upper, 3 lower. If you need more work on your upper body that's fine then. DON'T NEGLECT THE LEGS THOUGH!
- Change your rep sequence. Instead of going from 3, 15, 5, 12, start with the heaviest and work your way to the lightest. For example: 3, 5, 12, 15. You can benefit more from post-activation potentiation that way..which is probably what you say your body is responding best to..Plus you won't be too fatigued during your heavy set of 5.
- Don't worry about volume. As long as you progress, you're fine.
- Personally, I like 3 compound exercises (bench, squat, chins) per workout when doing 3x week, then a couple of assistance exercises (curls, skulls). Of course you can have a day dedicated to upper body and a day dedicated to lower body. Just make sure that most of your training is from compound exercises and not the fluff.