If you are specifically referring to fan-made modifications for the 3DS or mobile versions, these are common features often found in popular community "hacks":
: A massive "hack" for the grind is the added feature to speed up turn-based battles, which reviewers find makes the loop much more addictive. Monster Hunter Stories Hack
You specifically enjoy the "retro" handheld feel and want to experiment with community-made difficulty patches. Monster Hunter Stories 3 - Review (Spoiler-Free) If you are specifically referring to fan-made modifications
You want a polished, stable, and legal experience with updated graphics and full voice acting on PC, PS4, or Switch. : Certain hacks allow you to obtain high-rank
: Certain hacks allow you to obtain high-rank monsters (like Elder Dragons) much earlier in the story.
For most players, the remastered version acts as the ultimate "hack" by fixing the original's limitations.
You want deeper mechanics and better visuals. It’s widely considered a superior RPG.