Hey,
first of all: I really love the snapping candidate approach. I love to control the snapping by selecting one or two candidates and moving my object slowly to snap it to the gaps (see attachment 1)
The problem is: When I'm slowly moving my object, it often happens, that shapes near the desired location are added to the candidate list, messing up my candidates.
I'd like to chose the candidates manually, maybe by clicking the mousewheel or another shortcut. Another option would be an isolation mode to exclude other objects temporarily.
~Andrej
PS: Ignore the top left object in the second screen.