As stated elsewhere, I don't see too much short term help in chivalry. We'd get it in some ten turns if they go straight for it.
I don't think knights will help us in the short run (in the long run, H'Watchas will be our tools).
They are way too expensive compared to MDI, especially if I compare the warriors we already have to the horses we'd have to build.
It would be nice of course if their MW can't retreat and our units can retreat after killing the final unit of a stack - but I guess that's really "nice to have".
So: No sidestep to Chivalry.