I suspect that monkeysuncle is right, but I'm more than happy to sign "the petition" anyway.
As far as food show hosts go, they don't get much better than Jeni B imo.
Her wit and her humour were the tools of her trade, and combined with her knowledge of food, she could cut to the chase within one sentence. Jeni has the ability to stand in the viewer's shoes and ask the kind of questions that a live audience might produce.
So often she would ask a chef: "and why do you do that?" And quite often many of them didn't know 'why' they did what they did, i.e. they just 'did it'.
But no doubt any chef with any sense would 'know why' before appearing on the show again.
I also miss Jeni's honesty - on most food shows the reaction following tasting is invariably: "mmmmmm"; even when you wonder how such a recipe could ever produce such a result. But with Jeni, if it didn't taste: "mmmmmm" then she would say so, and even if the words were unspoken, her facial expressions often spoke volumes.
As we know from past postings on this board, Jeni can have a polarising affect on audiences: many people loved her, but some found her hard to take, and what was magic for some was little more than an irritating distraction for others.
Rather like many foods that have a strong and distinct flavour that some people love and others can't abide, Jeni would delight or disappoint.
I suspect the program makers looked for someone(s) more middle of the road than Jeni, i.e. with personalities that would have a wider appeal. But when the vivid colours of a spectrum are toned down and merged, you end up with a grayness that has the bland appeal of magnolia walls in a newly build house. The effect is bland and uninspiring, but it's unlikely to upset anyone to any great degree.
Even though it has already been said by so may people before, I still remain hopeful that one day Jeni will return to our screens. 