If they were going to add a ton of features it wouldn't still be called a Blofeld.
It would take a significant amount of R&D and manufacturing monies to completely re-do the Blofeld. This is just a way of slapping it into a different housing with keys and a few extra features.
Extra knobs would be nice, and the shot you are seeing is just a rendering. Hopefully it will have them, but I completely understand if it doesn't. If we ever want to see the beast that will be the Stromberg it makes sense that Waldorf is taking a light & lean approach to their current product development.
I know it's normal to always want more, and to cry about it on the web when a rumored product doesn't meet your expectations. But if you have any business sense whatsoever you can understand where Waldorf is coming from.