It should work with the white ambiance with out any issues (make sure you include light_mode capability). Rather then ‘take over’ the Virtual Devices (VD) thread with Group questions you should ask in the group thread.
And yes in order to do this with the VD app it does mean creating lots and lots of flows full of lots of actions. (Its why we have the group app).
I cant speak as to what new features will be added to VD but I can say the group app v2 took ridiculous amount of limited spare time to develop and test. And I can say generally speaking each Homey app will do one thing, and one thing only. VD handles virtual switches and devices, Group handles the grouping devices.
I suspect that one day Athom will add simple grouping directly to homey as they did with virtual devices.