It's weird that Baby had such a high winrate in the network test but I don't see the appeal and I'm not having much success as him either.
Caulifla is still the best tank at the moment, but that's mostly because all of the other tanks are mediocre or outright shit. Cell was really disappointing and I don't understand how he's considered a tank. His rush attack life steal doesn't happen often enough or give enough HP to be even remotely relevant when fighting, and while his regeneration ability is great for healing, it doesn't do any damage and you can't rush attack during it.
His grapple is super shit until you hit level 3 since its range is short as fuck. The only decent skill he has is his basic bitch ki blast that takes a second to explode and causes slow. His super is pretty shit too.