Collisions within Wed would be useful in placing entities within a scene easily. Everything would have collision off by default (or on by default); pressing down a key while dragging an object in place with the transform gizmos would toggle the process.

Perhaps this would just be one method to integrate snapping; however, I do think branding it as "collisions" would help new users.

It would also be a feature within Wed that is absent in most/all? engines currently.

(Also, when running a level from Wed, it would be very useful to be able to easily switch to first person walking or flight cameras during run time.)