The problem with people dropping from warzones has little to do with the group finder. People quit warzones because they dont like the map, a lack of healers on their team, too many bad players, and/or going up against premade teams that are more interested in farming them than ending the match quickly. The majority of people who leave warzones immediately requeue for pvp, so why destroy the group finder queue times even further with this heavy handed change? Its not going to help the issue of people dropping for warzones at all.
Not totally true. Usually I leave only when the LFG queue pops up. So I agree with the reason of the change.