Hm, I thought we had moved on from instant runoff to STAR.
My own variant would use the STAR algorithm but require voters to give 1-5 stars to each candidate. The current system would then be equivalent to giving either 1 or 5 stars (which is what is how most users tend to use on review websites :-), except the two-phase behavior of STAR encourages “honest” voting as a bonus. I find STAR super easy to explain and understand – unlike anything with “Condorcet” in its name, which to almost everybody (certainly to me) seems to invoke feelings of complexity.