You can't deadlift 3 times a week, maybe once a week at most nor can you as effectively train your legs. If your pulling conventional your lower bag will usually fatigue before your legs, where as with a squat your quads should go out first. I disagree thats its easier to learn. Everyone fucks it up by bending they're lower back and not pushing with their legs. Pretty easy to squat, if your doing high bar you just sit down and stand up.