Forgive my ignorance, but... so far as I can tell... you don't gain any (significant) edge in MMA for bulging muscles. Strength, which you say is still there, is a much bigger deal. I get the ego boost element of larger (in visual terms) muscles, but, based on my limited understanding, it seems that the slightly smaller size could actually give you an edge in competition (easier to slip limbs through openings) if strength/performance isn't affected.
Just because this is an MMA Forum doesn't necessarily mean that everyone here trains with an MMA based workout program.
A few things you may want to consider
-make sure your form is good
-Change up your exercises. Doing the same exercise on the same body parts over and over are eventually going to lose their effect over time.
-Make sure you are eating right and getting your body weight in grams of Protein daily.
-Make sure you are getting enough sleep
-When you get back into the swing after a layoff don't try to hit the weights heavy start out light and work your way up.
Bodybuilding is a marathon, not a sprint. It takes time