With regards to slow over rates I think all players should be hit where it hurts, in the pocket. Otherwise why not play on until all scheduled overs have been bowled? The light at 6.30pm is generally OK and if it's murky, they use the floodlights anyway!
Umpires need to be strong and some things like the Vince referral yesterday seem to take an age to resolve. It'd wouldn't take much to remove some delays. Players are used to time cut off restrictions in ODI's and T20's so they should easily adapt in tests.
