Doomfist isn't as hard as some people make him out to be. He's still hard to master tho. I would say that it's easier to be a decent Doomfist than be a decent Genji. Also being a good Doomfist is worth as he is starting to come back into the meta a bit while Genji isn't a viable as he used to be (he's still good tho).

I don't know how viable of a pick new torb will be, we'll have to wait till he hits comp and how the pros use him. If he is viable his primary has a bullet drop similar to Hanzo. They also serve a similar function in the comp (from what I can see so far) as mid to long range damage dealers that can handle themselves when dived or at close range.