Hi Bhugarov. The 1.9 final is one of those MSI mixed bag of tricks. On the positive side some folks have realized slightly better stability at high HTT's. I was never able to boot at 9x300 and now I can and it's stable. I still don't run at that speed because the 1.6 voltage just runs my cpu too hot. My highest 1:1 ram clock went from 275 to 276. Now, on the negative side, the spread spectrum is enabled and grayed out so it can not be disabled. Some folks feel this is hampering their overclock. Also, as per your question, there are no changes in vdimm, vcore, multipliers or dividers.
BTW, there are several modded versions which give you many more ram timings options. I tried some of these options in the A64 Tweaker, and since they didn't help me I never used any modded version of the bios.
That's about it. Take care.