Like the title says. We can snap walkways to foundations, but not vice versa. It would make multi-building structures and bridgebuilding look cleaner. Also, if possible, removing possible hologram configurations that phase through existing foundations or slightly expanding the windows for some configurations would be helpful. I find it difficult at times placing ramps mid-foundation. Both of these are definite QOL improvements, but would make clean builds much easier for the perfectionists.