so the kasumi clone that ayane and hayate killed was alpha or a kasumi shadow clone???? so there were 3 clones on the loose??
If they are following the canon of DoA Dimensions, this new character can't be Kasumi Alpha because she was mutated in Alpha 152. According to the new canon, Kasumi Alpha and Alpha 152 are the same being.
Of course the killed clone was neither this shadow one, that instead appear to be releasted with the phase 4 Alpha.
There are endless ordinary clones of Kasumi, apparently seems that MIST used a clone of the girl for introducing her on Helena's side and then use her like a bait for attracting the ninja inside the laboratory (what appear to be the purpose of Rig).
For the record, I don't think this new character is Kasumi Alpha. I mean, it might be the Kasumi Alpha, the character, but I'm not expecting the Kasumi clone moveset from DOAD.
Like I said she shouldn't have the possibility for being Kasumi Alpha, but also if she was her, you are right that surely she will not have her moveset from DoAD (in the end the Kasumi's one from DoA2).