This is selfish for my own game project. So I am suggesting it! I am interested in tile-based movement (i.e. old school Pokémon, original Zelda, Sokoban). I've been working with tile-based movement and it is not as straightforward as you might think.
There's potential to expand its scope to square and hex grids as well as the resulting 4, 6, or 8 directional movement. The library could also account for turn-based movement versus real time.