Personally, i think there are 2 acts worse than Ash & Robert who stayed.
Ray is nothing more than a Stage Musical singer, not pop star material in any way.
Good voice none the less, but simply not a pop star.
The McDonald brothers are absolute rubbish, they really are, not great singers, not performers, and in all honesty, i too can not quite see how they got this far.
Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed