First let me say great update!
Questions:
MT is media tokens.
HMT - what does the H stands for?
I think the 2 hours window is a wonderful change.
The advantage should also be simple and not to high on later voters up to 24 hours (lets give all timezones a chance).
Very good news and wonderful to see how the developement methods of the future starting here on the decentralized Hive.