Hi am now back after day out with my guests. No cork trees in sight, so only just getting back to fitting answers in grid. Speaking personally I love the mixture of hints and friendly comments and can't see that it impedes other site users, so I'm all for keeping it going.
I haven't really considered the possibilities for the three letter phrase yet but something popped into my mind - what you end letters with to your nearest and dearest, just before you sign your name - 3,2,4, the first word starting with 'a' and covering, to some extent, the plural hinted at. Covering, too, the suspicions I have regarding grid entry, which I am off to test out.