I've started on this program from Jim Schmidt's (former US Olympic coach) DVD/book. The first 12 sessions are hang snatch, hang clean, deadlift shrug, push press, front squat, overhead squat and bench press (i.e., no back squat). I suck majorly at the front squat and overhead squat due to limited flexibility.
My question is, by missing out on the back squat, am I limiting my strength gains? Right now, I can only do like 60lbs on the front squat since I can't get the bar to rest on my shoulders so it's on my fingertips. I could do much more on the back squat. So are my leg muscles missing out? If I were to swap the back squat in, what could I replace?