Although in early 1998 he was still able to do five reps in the bench press with 495 lbs, three reps in the squat with 855 lbs (with no suit and no knee wraps), and three reps in the standing press with 405 lbs in training, while traveling with the World Wrestling Federation , he never returned to compete again in official championships in favor of his wrestling career.  He weighed 380 lbs at that time, and his right upper arm was measured at 24” by Terry Todd .  By basically ending his lifting career at the age of 26, it is probable that he never reached his full physical potential as a professional lifter. Henry remains the youngest man in history to squat more than 900 pounds without a squat suit as well as the youngest to total more than 2,300 pounds raw  – he's the only person ever to have accomplished any of these feats at under 25 years of age. 
some thoughts concerning point 1 squats:
powerlifters and olympic lifters each have their good reasons to squat as they do. They way they squat brings the best results for them. The highest weights. Whether this kind of training is very healthy on long term is a different question.
BBler are not bound to these strict requirements. They have a big number of exercises they can do for each bodypart. Good routine, bad routine? I doubt. As an example the squats: before you decide whether low or high bar squatting is better for you you have to learn the strict execution of these styles. If you can see and feel the difference you have made your own experience. Before you have done that you take over experiences from other people.
All these matters, which exercises, how many sets, how many reps, how many exercises, how long rest between sets, how long rest between training of the same bodyparts depend individually from person to person.
Maybe it sounds complicated but it isn´t. Listen to your body.