He is cheaper but weaker in the straight fighting department. The spets is his direct competitor due to his mods. You could also use the other versions of spets. There is also Uxia who is a bit more dangerous as well as she starts in close range. I think Bill seems to really shine in a link. There are other options in vanilla that can also do his job. He is still a good option just less exciting because he has no way to get up the board safely to use his advantages.