It is actually pretty common here in the US. US Airways will run 2 or more flights to a destination in the same block of departures during busy times. For example, on July 18th they have a 2000 and 2015 PHX-LAS, and on July 19th they have a 635 and a 645 LAS-PHX. In AWS, those would be penalized now. That was just one quick search, I am sure there are others. I know this used to be even more frequent in the America West network where they would run 3 or 4 flights in a bank at, say, 0700, 0702, 0705, 0709, then a break until 1000 for the next bank. Bottom line, I don't think anyone is complaining about the elimination of the benefit of frequencies if 5 flights depart at 0500, but it would make more sense to threat all 5 0500 flights as a single frequency with the ability to sell all the seats instead of how it is currently programmed. If your competition has 5 flights at 0500, 0800, 1100, 1400, and 1700 offering the same seats, they will win anyway!