Actually Auria has worked very well for me so far and all the updates are to get it running smoothly which is what the latest update has accomplished with audiobus support and new plugins with every release. I own Cubasis but it’s not even in the same world as Auria. For that to happen Steinberg would have to release Cubase 5 for the iPad.
So go on Steinberg make my $50 app worthy of being on my iPad.