Am I done with the ABS Diet?

I'm wondering if I've whipped the ABS diet. And I'm trying to figure out what's next.
I'm 6'3" and I'm down to 202 lbs. I started out at 218 lbs. I still have a few more lbs of body fat to lose. But I'm definitley seeing improvement in my muscle mass especially in my mid section. I've followed the ABS diet almost to the letter. (I'm a father of 3 so it's impossible to do it to the letter.)

1) I'm never ever sore. I've trained seriously before with the Hard Body Man book. And would come out of that just beaten down.
I come out of my workout now just tired, but not so wasted that I cannot function. Plus I'm eating a at least 25 grams of protein 6 times a day. Could this contribute to me not ever being sore?

2) I only have time to do 2 sets. I do the advanced excercises that are in the book. And I have been steadily increasing what I lift. I know I'm at my max because I'll lift 8-12 reps or until "muscle failure".

So my BIG QUESTION is - have I reached the end of the ABS diet?

Do I need to move on to something more intense?

What is the next step after ABS diet? Is it Men's Health Power Training? Here is the link:

http://shop.menshealth.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10004&storeId=10053&productId=115932&langId=-1

Any help or guidance would be greatly appreciated.