Love the idea of an opening roof to create a summer lido - although not sure how well it would work in reality since you'll only really get the effect while the sun is right overhead - at the point we're told to keep out of it. I suspect the roof may be too high to make it feel really outdoors. Still, would be amazing - particularly perhaps if the pool could have windows/doors to an outside terrace.

Wave machines and slides don't do much for me. In many pool complexes, they seem to be out of order often. Kids like splashing around regardless whether they have a slide to do it on or not.

Machine rooms (although can I add a desire for a free weight room rather than just the machine weights) and a studio for dance/yoga/classes/stretching would be good.

Count me into the group who'd rather see games courts/halls rather than classrooms and meeting rooms.