CW might say that but did you bother to check up on how much volume he says to do in the gym? If you're getting stronger, that's great. But that doesn't mean you can't improve on what you're doing. Simply accepting you're getting stronger is the wrong attitude in my opinion.
For example, there's this one guy I see regularly in the gym. This guy is my entertainment because he's got some terrible form on almost every exercise he does. But, he still has a decent physique.
Lifting weights is lifting weights. But if he took the time to learn how to lift properly, he would be making better use of his time and would see better gains. Honestly, I'm surprised he hasn't hurt himself yet.
I definitely wouldn't say you're not training enough. I agree with tiribulus that you're volume of training is definitely high. It couldn't hurt to drop off a few sets or reps. If anything, if you don't like the results from doing less volume, then simply boost it back up.