Kid's not overpowered from the start, and while we barely see his growth, it's VERY much implied that he's brute forcing everything while actually getting stronger. Would be nice if the growth slowed a bit so we could actually SEE his growth, but so far this is decent. The status window being a piece of paper you need to buy is certainly something else though. It's nice to see that it's not just yelling a word and getting a magic window. A blood test that's exaggerated is so much more interesting.
Premise sounded very cookie cutter and stale, but so far this is good.