Absolutely! While Palutena is definitely my most-played character, I have many hours into a variety of characters, some of which I have found relative success with in bracket. Moreover, I've helped many players in my region with improvement, many of which play a wide range of different characters. There may be a couple gaps in knowledge with some of the more obscure characters, but I've watched and played enough high-level Ultimate to help most players regardless of skill and character choice.