If you were going to point out a 7.3.1 feature to your users as "the best" (from their perspective), what would it be?

This doesn't necessarily have to be new to 7.3.1, maybe it's just new since an older version of Threads or Classic. Or, maybe it's a key feature that some other boards don't have.

The ability to make special defined groups and settings for such users in groups for just about everything.

7.3: Custom Tags
7.3.1 is simply a bugfix release, so no new features ... For bugs being patched up, I'd say it's the one we're not supposed to talk about