Add CAD path creation/modification tools
Some wonderful tools that would help are Trim, Extend, and Corner tools.
Trim allows you to stop a line at another line. So if you drew a + you could trim the top to the - and make a T.
Extend does the opposite. It makes a line longer until it hits a target line. It turns |- into a T (rotated).
Corner tool trims or extends two lines as need to make a corner. |- becomes L by clicking both lines.
Look to AutoCad or Revit for examples.
All three are definitely needed for those who construct rather than draw, true.
There are some paid tool wo do that, by AstuteGraphics (ExtendPath, Trim and Join) and RJGraffix (Trimmer). Corner tool is something that still can be done manually with extending and trimming after though.