How dare you think Luigi couldn't be good?! Lol just kidding, I understand. But I actualy think he is very solid, his aerials are so good now that hitstun is back. He doesn't struggle to rack up damage at all, but finshing is a bit risky (but not really difficult). I also can't really see what Doc has better than Luigi, they both rack up damage well and finish well, but Luigi's recovery and offstage game is better as well as his zoning game. I still hope Doc can be good :).
It's sad when people switch mains because they just can't use a character anymore. But I think both Wario and Luigi are great doubles characters (maybe even on the same team lol). I don't really innovate much either, I like to watch Boss and see what moves he chooses to use at what times and why he does.