I’ve been working on tilesets for a platformer. Ground tiles have been designed so that the player character overlaps the tiles by a small amount, which means all the tile collisions need to be inset by four pixels. It’s been fairly painless (‘Snap to Fine Grid’ is awesome), but there’s been a few cases where I’ve had to count pixels and hope that I’m placing collisions down correctly.
So, a suggestion: A new View mode to display tile collisions in the map.
It’d be very convenient for drawing collisions that span over several tiles. For example, long slopes, or tiles that blend between steep and shallow slopes.