Shifting a neutral rating to 2 stars instead of 3 is what I'd prefer though, since that gives all the granularity necessary for rating tracks in my opinion. 60% is not "neutral".
I agree completely.
I've asked for it before, but I'll mention it again... What I would like is:
Tools > Options > Library & Folders > Rating Weight Bias that defaults to zero (which preserves current behavior) but allows you to select integers in the range -3 to +3 (or maybe -5 to +5 but that seems unnecessary).
I'd set it to -1 and then Play Doctor would consider my two-star rated tracks what it considers 3 star/unrated, and I think it would improve the behavior of Play Doctor with my system of rating.
I don't know that they said this would never change. They may not have liked certain proposals, or not commented, but there are other fish to fry. Would have been a good one for the thread, but I forgot about it until just now.
As far as half-star ratings, I'm not interested. It
might be nice if you could set the range on the stars so that you could use Stars Edit Types for other purposes more easily (so you could set it to 10 to get ten stars, or 3 to get a three-way switch, as discussed in the Checkbox thread). Might be nice, though I'm not super motivated to push for it.