The ability to pull in projected geometry as real geometry or construction geometry is in the release candidate for V1.1 that should be released reasonably soon. There's a lot of other cool features in V1.1 as well.

I treat FreeCAD as a rolling release, using the dev version on a decently complex model [0] and it has been a really good experience so far. Lots of useful features and fixees going in all the time.

[0] https://github.com/dekay/vpin-cabinet/