I agree that Bishop and Smith are no great loss, but I personally was seriously underwhelmed by Jade and I'm completely convinced that it was the Lloyd-Webber effect, publicity (and probably some finance) that got the result, I mean Daine Warren's "lyrics" came across as something she'd probably jotted down on the back of a Virgin Atlantic Upper Class sick bag on the flight over.
Unfortunately, I don't think the BBC will react to criticism, they are seemingly oblivious to comments, and will see it as obsessive fan whining whilst their true market is the middle-aged viewer who tunes in on Saturday night to laugh at the voting and rake in the scheckels on the phone vote (and apparently, every year the largest UK televote is for the UK despite the great British public (oxymoron) being told they can't vote for the UK...). It's a cheap way of filling two evenings on el cheapo BBC3 and a very good value tv spectacular to fill a Saturday night in May on BBC1 between some dancing programmes and the summer "let's give up the fight until September" schedule.
There again I'm an arch cynic, despite that I hope your optimism is right