So, I briefly spoke with @Hamed about this. It's doable, but trickier than I thought it would be.
Showing the collision editor from within the behaviour editor is currently not possible, just because of the way we manage the editors. We'd have to change how it works behind the scenes. It's possible, but requires a bit of time.
Changing the collisions using an array of points is easier, but the issue here is there is currently no point of reference for users. Meaning, it would be a lot of trial and error for you guys since you don't really know where the points are.
We'd need to tweak the current collision editor to show the point coordinates, this way you would have some sort of idea where things are if you were to enter the points manually with an array.
Soooo, It's doable, but not for a little while as we're in the middle of 3 updates.
IF this is something you guys really want and will actually use I can try to prioritize this. But I don't want to spend the time on a feature that won't be used.