At $400 bucks, I'm sure they'll make plenty of money on new sales of the V Collection ... (and then it'll go up to $500, after the intro price)
Also, remember: the V Collection isn't their only income source. They're selling all that hardware now too. And from what I can tell, selling a good deal of it. I've seen TONS of people using MiniBrutes and the Beat Step Pro, as well as other Arturia hardware.
So I hardly think giving us prior owners free updates (particularly when they've been this long in coming, especially the GUI resizing) is going to affect their bottom line very much.