It's absolutely possible to continue doing squats + bench + deadlifts in the same workout for a very long time. After about 6 months I moved to deadlifting only once per week, but it was still done on my "heavy day" after setting PRs on my squat and press/bench press.

> Mark's hybrid squat, and low bar squats, put a huge amount of pressure on your elbows and shoulders.

I had this problem, and it turned out to be a form problem that my Starting Strength Coach fixed without switching to a different exercise. You can't do the exercise wrong and then claim there's a problem with it.