If they can open up the outfields a bits to let the breezes come in, the park wouldn't lead the league in homers, but it at least would be a dead zone.
Took my wife to the game last night, her first this season. Ugh. In addition to the total lack of game events to cheer on, the temperature and humidity were stifling. No breeze whatsoever, anywhere in the park that I could find, except for in a few of the tunnels. Having an open design, as I'm sure the new park will have, will also allow breezes to make the hot weather experience a bit more palatable.