This is was my take on World and MHXX before we knew that MHXX isnt getting localized:
MHXX looks like a rushed port to me, as even Wii U's MHU3 had updated fonts, that the Switch port lacks.
If Capcom was laser-focused on a takeover of the west with the MH franchise, a PC sku is very important and Capcom has been the best Japanese developer to support the PC. So, why is the PC sku delayed? I would think that World was indeed the future of MH, and PC is a lesser platform in Japan. But then, Capcom (among others) were caught by surprise by the initial success of the Switch and the less than stellar performance of the Ps4 in Japan and scrambled to put a MH there in order to not burn that bridge.