Agreed. Helena's core motivations are pretty simple. Save her Daughter. Everything else stems from that goal, which, unfortunately, can blind someone and make them easily manipulated.
As for Myka, that may be a piece of Fridge Brilliance. Myka's had a bad time growing up with her dad, was hard on her and the like. So she's happiest when a surrogate "dad" is telling her she's doing a good job. Could be wrong, but that would give her happiest a bit more depth. She is a bit of a shallow character, but that is the burden the straight man must carry...
Remember, H.G. killed McPherson before he could tell them about a plan, and he debronzed her for a reason. Many questions must be answered, but still, I hope they don't go for the Face heel turn, it's what we expect, and it'd be nice to have them do something new.
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