Yeah, TotalMix FX is my control room. I use RME UFX and I don’t need to use Cubase’s control room, it wouldn’t add any extra functionality, just extra hassle. If you have a Steinberg interface, however, you’re given an interesting level of integration. In that case I would totally use Cubase’s control room (also because I’d have no alternative, since TotalMix FX only works with RME products.)