She was basically a better Finley before, as it was fairly easy to set up a board to charge her and then fire her for nearly equal benefit (4 extra green shields after charging her) or with even greater benefit (5+).
It may sound like 8 to charge +4 extra after that was a lot of work, but the extra don’t necessarily need to be able to be matched – they could be in any place on the board.
But now though, she requires 2 more to charge (10 matched) and 2 more after that (6 minimum) to make good use of her skill.
She should get back either fast speed or her original defense drop values. Before she was too easy to use well, now she’s too difficult to use efficiently.