Penda, sorry to see you go - but also sorry to see that you think adding a Sunday Times clue to an existing Sunday Times thread is a bit too much to ask! If every query, every thread, related to one single clue, the front page/opening of the Forum would be extremely tedious.
Times 123 16 a
Times 123 14 d
Guardian 678 2 D
Guardian 678 9 A
Times 123 8 A
Guardian678 4 D
Times 123 2 D.
Those two puzzles could take up the whole front page - with Private Eye, Inquisitor, Listener... being bumped further and further down.
As a Times solver, I like seeing the Times threads - and there's often a bit of discussion, conversarion, too. If we did it the Penda way, I'd be leaping all over the place to see if anything interesting had been said.