I think the facade at least should be kept. Be very careful what you wish for...as the writer above says, once this unique building is gone, it's gone forever. As someone who watched the farce of the Stoke Newington pools unfold, I know that councils promise much that they end up not delivering.
I'm totally against losing the old building but realise I'm outnumbered. Shame, I was one of the hardcore who used the pool through thick and thin and supported it because I was worried it would get torn down one day, and now it is. We're going to lose an irreplaceable part of FH's history and for that reason I'm very sad about it all.