That's great progress, Mike!
While actual loose skin is possible, it's likely that you still have a layer of fat hanging on there, just under the skin. I have that, too. It's frustrating to be lean and not see the abs, I know. The last two are still hidden, for me.
So, it seems like you're on the right track by trying to get leaner and a diet "shakeup" might do that. A change to a lower carb, higher fat diet might be good right now. Adam's Diet is a good example, but you might be better off if you get the new
TNT book.
TNT is Adam Campbell's new book, and a more detailed and effective version of Adam's Diet, really. It's got all the diet direction you'd need AND great workouts, too.
That being said, you have to eat fat to keep your hormones going strong. If you've been avoiding fats, then that could be a reason why things stopped. Plenty of fats are required to keep testosterone higher and estrogen lower, get those out of whack, and you start to add or retain fat. Especially in the wrong places, too.
Don't be afraid of fat, either. Dietary fat really has no bearing on being, staying, or getting fat.