The #1 most important QOL feature that NEEDS to be in MHXX but hasn't been announced yet

More space in your item box.

This is the first Monster Hunter game where I had to start selling anything I wouldn't use just so my box wouldn't be full all the time. Now MHXX is gonna add a dozen new monsters or so and lots of other new, miscellaneous items exclusve to G rank. My item box just can't take this much abuse!