Pretty much the only reason I haven't switched to the pro max. I went ahead and updated to the beta and my battery is okay again, but the pro and leather cases is chef kiss. The size with a RL open bottom case, it's literally perfect for me. Not too bulky, still portable. Take a pro max with a leather case, that's a brick man! I'm 6'3 too with i'd say decent size hands, and the pro max is a bit too much for me.
I do dream about watching youtube and the battery life on the max though. If I were to do a max, I'd probably do like a benks armor air, or a pitaka. Some thin case that's really just for grip. I don't like the way leather cases look on the max personally