his ult generation is bonkers right now.Yeah Rocket can be good, he can heal without taking risks and he's okay in terms of mobility, but he's also lacking a defensive ult, which is pretty much meta at the moment, and pretty bad at doing damage compared to... pretty much every other healer.
He can shine in a 3 healer comp, but you cannot replace a Cloak & Dagger / Luna / Mantis as Racc00n in a 2 man comp (except if there is a sizable gap between you and the other team). But he's very fun to play, and you can probably push him to Diamond, it's just going to be way harder after that
I head this little nikka use his ult in the first 60 seconds of a match I was like WTF