At the moment sills are just flat slabs that don’t look good at all. I attached a picture of a european style sill that’s very common here. Most of the time they are also angled down slightly and have a drip edge. Furthermore they cut into the wall slightly. This is kinda available with the interact tool though the sill just clips into the wall instead of removing the wall in between.
Please give us some options to make sills more attractive (maybe sill presets?).
Other than that, keep up the good work, you guys rock.