30 overs is just pathetic, might as well play 2020 and have done with it and kill off anything but slap and tickle.
As for short turn around times, why not? You don't need 30 mins break, and if someone says 'but I've bowled and then straight out to bat', well tough, that's part of the challenge, or let someone else play!
I'd get rid of teas personally as I dot eat them as I open and don't like eating before fielding and suffer no ill effects during the game even when it's hot