Yeah, that looks pretty optimal for playing. Especially the height, there's one foot between my top and bottom... Less if tilted of course, but I'm not fond of tilted keyboards, at least not in that direction. If I flip the extension arms the only difference would be the height... Hmm, maybe I should, but then it'll take up more space...
I have no issue with seeing all sliders on the bottom synth at least. But the height may be a bit off-putting, the stand is adjustable but the extension unfortunately isn't, the height is fixed at one foot.