Played around with partial capoing years ago. And gave it up as an inefficient diversion and decided to retune when I wanted that sound and hone my chops instead. There's no free lunch.

Not to say it won't work for others. actually I found a song that had a sound in it that couldn't be achieved by any other means than using two Kysers, one partially capoing strings higher up. But I could never see myself playing that song anyway.