Is it? If the development department at Steinberg/Yamaha sees that there is sufficient interest/demand, they might do something about this hole in Steinberg product line (that’s how businesses work). One can only hope.
If you can’t afford it now, start saving. Saving up €2000-2500 is feasible for most people, in a reasonable amount of time. Saving up €20 000 (or whatever a Nuage console costs) is not.
Even if you can’t afford it now. Cast your vote, and start saving. Should Steinberg decide not to make a control surface, you still have your savings and that can only be a good thing, Don’t you think?