About MBC, we currently have something that's nearly instant but just slightly less consistent and doesn't require mblock to perform. If you watch a few duels around the 49:30-52 min mark of my Blue and Yellow video, you will see a few examples of what I mean. Those are basically instant pb counters but without having to mblock as well to get them to go fast. My preference is to have mechanics be consistent and clear and I think if mblock counters were handled correctly(reducing bp dmg or whatever), it'd be good to have it in the game. The reason why I say this is because we already have instant counters. They are just more inconsistent in general and don't require you to mblock. I miss the days of instant disarm into kill, especially good in open mode if you're 1v2 etc, can really turn the tide. If anything, MBC was super good for open mode.
The only problem is that this mechanic makes attacking harder. Back in the old days when things made sense, mblock counters were tied together with nudge so that you had a way of bypassing good PB and mbc defenses by nudging halfswings. At this point, I doubt nudge will make a return, but in my mind, mbc and nudge go hand in hand because of what I've just described. That being them complementing each other as mechanics. Having said that, I wouldn't mind a return of mbc if they are balanced correctly. Having a mechanic like mbc in the game also requires the rest of the sabering system to accomodate it properly. But seeing as we already have something that's close to functioning the way mbc does, I am not opposed to re-introducing it even without nudge, but it should be balanced properly.