Later-no-harm is sort of a meaningless criterion that was invented by a group called Fairvote to push IRV under the name Ranked Choice.
They invented it to say that Cardinal voting systems don't let you rank preferences. Which is sort of the entire point of cardinal systems. It's not much of an issue in the real world, because if you're happy with A or B, then you put down a vote for A and B. In any large scale election, there will be enough people who have a set preference that they only chose A or B and not both. The point being, a vote for one does nothing to impact a vote for the other, because you count the votes independently of each other.
The problems of IRV are many and varied. It has to be counted in a single centralized location, which leads to problems and security issues. It still has favorite betrayal, and the more viable candidates you have, the worse it gets. This means that you have to have some strategy while voting, but it's much harder for the average voter to know if their strategy will do any good.
Then there's the issue of exhausted ballots. Again, the more viable candidates you have, the worse it gets. Most of my data is from US elections that use the system, but the city of San Francisco sees about 18% of ballots thrown out due to ballot exhaustion. That alone is horrific.
Now, switching to another plot here, STAR is not approval. Star lets you voice your true preferences for candidates in a way that Approval and even IRV do not. Take a look at this graphic again.
First off, the average person sees it and says oh, it's a 5-star review. I know how those work. Then they rate each candidate on the scale of 0-5 stars. That's actually one of the most common ways people fuck up an IRV ballot. They think it's a 5-star review and give multiple candidates the same number.
So the next part of STAR is the automatic runoff. You take the two highest scored candidates and then put them head to head, but you use the preferences on the ballots to do it. If A is rated higher than B on that ballot, then the vote goes to A. If A and B are the same rating, then that ballot is counted as "No Preference". And the number of those ballots is also released at the end.
STAR gives you so much more information about candidates than any other system. You have an instant approval rating in the form of a 5-star average for every candidate.