1. I miss that a lot, and don't know why it haven't been added yet. There was some explanations made by Ashley very long time ago, but I think they do not apply any more And this feature itself could make life easier (and use less events) in dozens of projects made by people here.
2. Be able to compare a solid,,,,on collision with , is overlapping - What do you mean? Solid is just a behavior you are adding to objects that will have collisions.