The biggest hurdle you'll have to overcome is pride/ego. You'll learn, rather painfully, that you'll have to drop some plates in order to execute the proper squats you've deprived yourself from, and that's a hard pill for any lifter to swallow.
I've had to do it myself, and it was heart-wrenching to drop 90 lbs from my routine just to do squats properly. I went from "repping" 315 down to 220s, suddenly I was a chump, but I lived with it and noticed results...
1.) My knees hurt less and less, no longer sore
2.) My thighs got bigger, stronger
3.) My ass got bigger, more full
4.) My hamstrings got bigger
5.) More importantly, it strengthened my core more.
6.) In addition to these, my other workouts improved, because proper squats makes you stronger all around.
I eventually got back to my original weight, but it took some time. It was definitely worth it, and now the few serious lifters in my gym give me some respect for actually doing it properly and I can only smile when I see others in the same place I was.