I think that's what they dealt with last night. Alpha was able to maintain multiple imprints. Bits & pieces, but he held together pieces of all the imprints he had. And he was able to get Echo to jump out of her current imprint with some of the stuff she had before also - the imprint she was in had no ability for the fight back she gave.
So, the question is, can she grow to hold together enough imprints?