If physical characteristics had been primary criteria for selecting the site it certainly wouldn't be where it is. It's a #@#&ing swamp for Gods sake!
hope they're putting down some very deep piles (how deep to good rock?) Will the stadium be built in multi separate floating sections? (otherwise it might break up ) - spectators can practice long jump in the upper walkways moving between sections
maybe a big moat and some significant pumps will be the go and we can play boat races for real, not just in the bars - would put a new dimension to "doing laps"