This quote from Ponting in an article about over rates/the shot clock seems apt, even though it is about something else (reverse swing/ball tampering):
Slow over rates are only really a problem when conditions are heavily stilted in the batsman's favour, which is a much easier (and preferable) thing to deal with than parking a massive digital countdown on the side of the pitch."So let's look at having a fair playing surface then the problem might start looking after itself."