Gotanda Rank Up discussion

Why is it HP%? His primary role being DPS and no ability scaling other than just a flat survivability bonus it doesn’t make sense. With how important rank up is for helping characters in late game content, why isn’t his rank up something more valuable to his kit? Something like Movespeed, Stamina or like other DPS units a Attack bonus even if it’s a flat amount instead of percentage. Other DPS units (most tbh) have Rank Ups that synergies really well with their kits, but I feel like Gotanda doesn’t. It would put him from great to nearly perfect if it was changed to a different stat in my opinion.