We might be able to get by without having a Google Plus. I can't comment on channels but I can comment on videos I watch. And if I want to tell someone something, I can send a PM. That might work, that might not.
YouTube keeps asking me to add Google Plus. I'd rather not. I mean, I wouldn't use it anyway, but every time I've tried to delete it, I get asked again when I try to comment on someone's channel. It's just annoying.