For me, its such a difficult task to manage. Introducing run fines for the bowling team will probably mean more glove changes, more drinks for the batsmen all slowing down the over rate to gain an advantage. I believe at the minute there is an official that manages the over rates & calculates the amount of time lost via "other means" such as physios, new gloves, bats, players going off the field etc ( we probably lose 3 overs a day in just reviews alone sometimes) so whilst we may only see 80 overs in a day, we could still be hitting the required rate per hour due to those losses throughout the day.
There are definitely issues, im just not too sure how you fix them in a fair and equal way