Issue found - 1.4g breaks custom DNS for me and a few others. Route10 - 1.4g firmware breaks custom DNS
Also, even though sticky dual wan issue was apparently addressed, I still have the same issue on 1.4g, devices sticking to WAN2 even after WAN1 restores. The user interface could really benefit from a sticky connections toggle - for those who want their router to failback to WAN1 as soon as its available (Like the UCG Fibre does)