It's only been on once? At a time where we're having unseasonably warm weather and people are out having BBQs and enjoying the light evenings. Hardly a good basis for judging whether viewing figures are plummeting.
As for Amanda Holden, I could always take her or leave her. However I felt desperately sad for her when her baby was stillborn and think she's conducted herself with such dignity since.
I enjoyed BGT. It was nice not having Cowell and Morgan. Both odious little creeps. It's a lovely change.