The only thing to bring yout temps down is to delid the cpu and redo it with liquid metal... also think that XTU uses AVX instructions, so 80°C there, is not even 70°c during gaming....
Nope there's no official date, however considering logical reasoning: I would allow a release till the 10th of April so everybody who has a similar board can rebench with the latest and greatest bios.... bu tI'll crosscheck with th'e G.Skill crew