that's saulcanner, he can
probably the top 10% of players can block standard attacks indefinitely at this point
Until you fall asleep, that is.
Personally, I have the delightment of still having things to learn and improve quite fast, and the nostalgia of the long gone days I could keep up with the best. Worse yet, I used to really like everything about warband melee combat, but hiltslashes, spam and over-footwork is polluting it more and more, at least in cRPG.
What we need isn't making the game faster, it's making blocking harder. The average player developped his blocking skill way over what was intended when Taleworlds released the game. It will be quite interesting to watch how this issue will be resolved in M&B 2. They'll have to both make it possible for newcomers to start playing multiplayer together with the experienced population, and fix the problems that emerged with the increase in skill on warband. If they do not, they'll risk either alienating their fanbase, or making the game prohibitively hard for new players. And it will probably be a very complicated issue that will require a lot of creativity from the developpers.
I don't think simply increasing the speed will fix anything. EU_1 already has trouble keeping up with 100 players. Furthermore, it won't shift the melee towards blocks/feints again, since movement will be faster too. The only positive effect I see is making it harder for ranged to track targets.