Grid movement kinda like the one we had in CC.
As for paths, I realise you can't do paths in the editor, but I'm willing to make an external one, and when you think about it the need for creating paths in-game far outweigh that anyway. A simple node based, runtime editable, spline movement that doesn't force you to use the object angle is what I'm suggesting.
Sort of like the one of Rojo's in CC, just no editor. Importing a json would be acceptable.
On the custom movement thing, how do you get it to interact with the solid behavior?
The idea for the Solid is to not have to set up collision events for it, but it only works that way with Platform.