A problem with all of these systems is that they are harder to understand, resulting in reduced voter confidence, or they demand more from the voter.

Any kind of ranking is going to mean you need to know enough about each candidate to put them in some kind of order. Maybe OK if there are two candidates but much harder after that. Most people will rank their favorite on top and then just randomly rank the remainder.

Simple plurality or majority vote is easiest to understand and easiest for the voter. You vote for the one candidate you like the best. If the isn't a majority for one and that is required, you have a runoff between the top two.