Great idea. It gives people incentive to remain in the WZ instead of bailing at the first sign of fail. If wins count as two wz's participated, then it is no different from before (i.e. 3 wins completes the daily). This is a change with no downside and will hopefully encourage more participation in PvP.
While several decisions regarding PvP have made me scratch my head, this one clearly shows that someone with some common sense is still working on fixing things.
Thanks for a positive change.