I mostly agree, the one big disappointment so far for me is that Cubase doesn’t support ARA. (Granted that was a relatively new feature in SPLAT too).
Cubase has the built in pitch corrector, so no need to go to Melodyne all the time, but if you use Vocalign it’s an order of magnitude easier to use in SPLAT or S1 than Cubase. (See my post here: Steinberg Forums )
Still, Cubase is hands-down the best alternative I’ve tried, of course YMMV.