I completely agree with you. Per rule 27, which Kayo explained, what can we say other than, as you state, "I wish she had stayed, but best of luck to her"? We can say things about transfers in general, and, sure, public comments are fair game.
As to rule 14, I, like you, "have no idea how to even begin to make that judgement call." Apparently the board operators give us quite a bit of leeway.
As a writer friend of mine has said, "You can never post too much." I look forward to them.