I think Bobby was Dianne’s last shot at being a winner, TPTB knew he would be popular with the kiddies and the nan’s that remember his angle muvva.
Even if she got a ringer this year, we know they never win and she is not good enough to get a duffer the glitterball.
Like a few others, Dianne has probably reached her limit of real contenders and won't be a producer priority. Unless there's any favouritism going on (like with Gio), I'd expect her to start winding down her stint now, getting a couple of duds and/or low profile celebs until she leaves. Same for Gorka, and Karen has already been on that track since Jamie.