User blog comment:Kogath/Monster Hunter: World Discussion/@comment-6050823-20180322235419/@comment-3298463-20180323111058

Generations and World were developed partly concurrently and by different teams so it's no surprise there's not much overlap between the two. Also developing for HD consoles is much more resource and time consuming than portable development in visuals alone, I highly doubt they can just port something from the portable titles.