My thoughts thus far:
Cyborg is still pretty much the same. My lack of knowledge in this match up embarrassingly caused me to come to the realization that both of his nova blasts are NOT overhead. Never really lost to Cyborgs enough to give me a reason to take him into the lab. Note: as with many characters now, be weary of throwing out daggers when they're within footsie range. DD can utilize his new armor, Cyborg hits harder, and many tournament videos of Frost vs GA show that doing so while forgetting about the range of his J3 is not a good idea.
Doomsday is still pretty much the same. If your opponent doesn't give you an opportunity to parry their moves by either grabbing or sweeping, feel free to liberally use MBF3 as the damage pay off is worth the risk. Side note: no one seems to ever punish sweeps in this game. Don't be a statistic; punish sweeps.
Shazam is the same. In fact as some may now start to utilize the mighty charge combo, note that you can full combo punish them in a variety of ways on whiff. No real reason to ever block low in the MU. The range boost on psycho crusher is irrelevant when daggers knock him out of the air.
Superman: lol
Batman- whiff punish b23 with iceberg every now and then. Otherwise the same.
Green Arrow: Due to scheduling conflicts, and Green Arrow players ducking me, this MU is inconclusive.
Killer Frost mirror:
Zod: lol you're not getting that trait out (iceberg on reaction whenever at full screen. Doing so on block gives him a free TA)
To be honest, I never really face Zods so I'm gonna do the smart thing and leave this MU as 6-4 Frost until further notice
Flash: I dunno, I tend to do very well against Flash. Since he received no buffs I'd suspect if that was the case it will remain so now. Right next to him, if you know he's wake up heavy, you can duck and prepare to uppercut just about all of his specials. BOTH LC can be punished with b1, however treat it like Adam's dive kick and don't worry about what he does animation wise after he hits you- as soon as he makes contact, punish. MBF3 through his b22, d1d2 shenanigans. Don't jump around like a manic because he'll usually win the air to air and can punish with a combo. D1D2D3 is punishable by 111. You can parry LC, but note that when you parry from max range his property changes. Usually you can 111 and he'll be standing. At max range a parry punish has his property as still in the air. Take this into consideration. You can back dash some of his pressure. Iceberg will catch RMS.
Black Adam: While not entirely free, it's definitely easier.
Other than that I haven't really played the MUs I've wanted to test out. Considering the lack of time with the aforementioned as well I'd say others should chime in with whatever they've ascertained so we can get a better understanding of what's what.
Side note, while Batcave is considered 'Frost's stage' be weary of selecting it against a good Green Arrow player. This should be self explanatory, but I can explicate otherwise.
