^Pray tell, what vital elements are missing? All I can think of is portability.
Honestly I wouldn't be surprised if MHW
ortable was announced late next year or the year after that. Capcom is not going to abandon their market in Japan outright.
But IIRC Japan's a market in decline. They need to do everything they can to have their star series reach a growing, thriving market (or at least one not in such an advanced state of decline) instead of one moving more and more to cell phones.
I imagine this game is a new jumping off point for both console and portable releases. Even if the sales performance of this game initially suffers from an anemic Japanese market, they're hoping to pick up the slack in the west. I bet they'll also use the assets of this game to make much cheaper portable versions that will succeed in Japan (who knows how it'll do in the west, but it'll at least hit the same audience the current portable games have).
TL;DR: I see this game as Capcom gambling to capture a bigger western console market than the current total portable market.