Imo, its not the best choice. I mean if you want to its your choice, but ur not going to get as good playing edgemaster as you would one specific character.
Maybe, but it doesn't mean it's not possible. Also, I may not get as good with Edge Master as I would with a single character when it comes to character knowledge, but it doesn't mean I won't be able to achieve similar win results. In the end it's always more about the player, and having solid defense and good fundamentals can make up for other drawbacks.
Also I don't usually choose my characters based on their style. For me it's more about how the character looks/acts. If I like the character I don't care what the style, tier, or how difficult they are. Damp could have Voldo's style and I would still use him. I chose EM as my new character not only because he looks cool, because like Damp I think he is hilarious with certain styles, and I love comical characters.