I think it all depends on your kind of operation and pressures to satify on time performance.
Scheduled & charter / short & long haul.... All different financial decisions that would have to be considered.
However, from my limited experience a short haul schedule operator should reroute if avail, particularly on first wave to protect operational integrity, as generally the costs involved are limited and the benefit of keeping the first flight on time makes a huge difference to this type of carriers punctuality..