They've made updates and bug fixes to PRV in X1 and X2, and in the patches, including the latest patch (e.g. track names on the right are a dark color, the active track is easier to pick out of the list, and when you click on a track in list, the track also gets highlighted in the track view, and vice verse).
I can't get by without PRV. The bugs have been frustrating, but most of them seem to have disappeared with the latest X2 patch.