Piper was actually a big source of frustration for me. Yeah it's dead simple, but once you have a CL chain, you're entering a world of pain. I've switched to Fig a while ago and haven't looked back. Beyond a tiny fix I'll start editing from CS or a throwaway citc client, it's just simpler to use fig. I've been able to juggle 4-5 CL chains easily and it makes my workflow much easier. Also splitting CLs before review is much simpler with Fig.

Are these code tools built using https://github.com/kythe/kythe ? Any other OSS projects by Google that back these?