There are very few items in the Zelda franchise which affect mobility to the same degree as the masks.
That's nice that you focus on the "game" parts, maybe you should read my article.

Overall, Majora's Mask must keep the dungeons, items, characters and assets from other games such as Ocarina of Time, otherwise it wouldn't be Zelda. But seriously, relative to Twilight Princess and Ocarina of Time, Majora's Mask is a huge divergence from series conventions.
I really ought to suggets some other games. In which case I'll volunteer Pilotwings 64. Unfortunately the flight sim was released side-by-side with Super Mario 64 and never really caught anyone's attention.