And pigs will fly.
Diverting the 185 and 176 to go up Sydenham Hill, down Kirkdale and round the houses to Perry Rise etc is a splendid idea in theory. But I expect that there'd be an outcry from local FH residents who might have to walk an extra 150 yards or so to catch a bus. Certainly Sydenham residents might applaud the plan until the High Street gets clogged up with buses, just like Oxford Street!