Day 2:
I've just returned from a 3 days trip, but managed to play some today, and these are my discoveries:
Ein's 8K and 1KK bounce big unlike Hitomi's, thus you can follow with 66KKK for some good guaranteed damage.Also it is surprisingly easy to hit with, and you are relatively safe compared to other moves with the same damage potential.
214 K is a perfect "anti low kick and anti high attacks" in one. The initial kick will guard you (against highs), and the final one will strike the victim, at the same time everything happens above ground, and you are quite safe in almost every way unless you mistime it completely or are read out.
236 K is perfect to crush alphas or other characters that uses strings to get in close. It also leaves you at +1 and basically is the perfect approach skill if you are out of options.
236 K to P strings will beat out anything except high crushes.
Weaknesses. Still I feel that Ein is quite a weak characters, but has some good counters. He crushes Alphas (then again, everyone is still learning the game, so this may change) and other string characters. That said I'm having a hard time finding decent highs other than the basic P string though, where this guy seems even more mid-punch heavy than Hitomi, which is insane. Only good thing is that people doesn't seem to know yet and keep missing the holds because they look like highs. (Then again, so do I against other characters still, so it is a learning game for everyone.)
Also I have a hard time finding decent juggling combos. I'm far away to the +50% health that I've seen other characters do, even in Tag (with Hitomi). Actually I've seen close to 70% open plain juggles (Momiji and Rachel), which starts off from basic 1 hit launch (OP like crazy, or do we have something similar?).
Hopefully I'll discover more tomorrow. I'll continue to write my "dairy" here.