When you see some of the absolute no name small indie stuff that makes it to the Xbox Store every day, the idea that SQEX can't even port their biggest and most mainstream series over is pretty absurd. If they really can't be bothered, it's their loss. No one owes them a purchase.
But anyway, if people want to get the game, by all means go for it. I gave it a 7.5. It's certainly a very nice looking game, but has some major flaws as well. I've played far worse than XVI. The annoying thing (as usual) is just the arrogance of PS fans demanding Xbox fans buy this game like SQEX is owed our money.
Metaphor is coming out day 1. Kingdom Come 2 is coming out day 1. Stalker 2. The list goes on and on. SQEX has to compete like anyone else, and they're doing a poor job of it. I already bought Dragon Quest 3 HD, because that's up day 1 and it looks good.