they always allowed you settings that can't work stable,
if they can sell a few more MBs because it can OC non K CPUs via BCLK they will enable it, look back at the 775 days, unless Intel behind the scenes prevents them,
bclk OC will always be a bit more difficult because you are still overclocking other things, uncore/memory clock will go up with it, so you have to compensate lowering multipliers and such, also the IGP will be unstable probably and they seem to force you to disable it, also it seems to disable the temp readings, it might also affect other things that need to be tested, like using power saving features, sleep and so on...