I just wanted to say a few things having fought him a few times Online now...just my rough opinion (I don't have him yet, I just fought VS him so far). I have no clue how to block wolf's strings, he crosses me up easily.
As Ragna: His jumping and ground hitboxes are odd and really hard to hit, I have a hard time gauging my spacing with him, and j.B doesn't seem to cross him up as well as other characters. Also, his DD Wolf Rush practically has complete priority over anything as as far as online play goes (I hear it's a 2 frame window if you block it, so far Jin's 5A wins, and maybe Haku-men's 2D if he got lucky, otherwise blocking and then doing Inferno Divider has an extremely low chance of working after it (unless you IB'd it). His anti-air kick really kills Ragna's Jump-ins, and so far 5B and maybe 2B or a very reckless hell's fang work on him.
As Arakune: Wow, I'm surprised by all the mess and dodging gimmicks I can get away with here, Ara's 2A dive managed to dodge the wolf a few times and hit anyway. Clearly Arakune's more mobile than Valk, even if Valk has good reach. His kick strings are strong but I slithered out of them a few times. Once I get curse going he can't move practically at all to punish, and wolf is just asking to get hit while cursed.
As Haku-men: Valk has a really good pressure game to work with...his kick actually beats out Haku's 4C!!? I don't get as punished badly for using D counters as I would VS Ragna or the faster characters, but Valk is still a decent mixup character to deal with...It's really going to take some time getting used to him and wolf and also how his DD works, since normally characters will stop if their DD gets blocked or wiffs...he just keeps going! O.o (I wish Ragna's CS did that!), Black-hunt/White-hunt got me a few times here, but his DD works so well after his wide kicks...I got lucky and 2D saved me at one point. Also Valk's throw and airthrow are beastly trouble here, getting punished for using D counter vs Valk really hurts. Still can't figure out how to block wolf.
As Tager: Not too much of a problem...seeing as GETB works on wolf!! Valk doesn't have a good DP, so Gadget Finger will give him trouble, IMO. He can still mixup though.
As Jin: Normally Jin has reach on characters, but for some reason I can't hit Valk as easily as anyone else...j.C, j.D, and a few others seem to wiff more on him. I think hit confirm works better for Jin here...because of Valk's reach it's easier to punish, but if you guess wrong you're in for hurt.
As Hazama: I'm not 100% good with Hazama, but from what I saw, Valk can dominate him real bad if he isn't zoning properly.
As Bang: 5A wins :P But seriously, Valk has good reach and can really mess up Bang's air game, also being a wolf throws off my D Guard timing.
Anyway, just my feedback. I'm looking forward to playing AS Valk next week hopefully. His Airthrow reminds me of Haku-men's neutral throw.