I believe there is a compliment somewhere in the following paragraph.

As a follow up to the last obsessive post:

"With Echo presenting two or three distinct reverberations per episode, the role would seem to require an actor of great dexterity, and Eliza Dushku is not exactly Toni Collette or Cate Blanchett. However, Eliza Dushku is exactly Eliza Dushku, and that is not a slight achievement. She powers convincingly along here as a scream queen, a comic naïf, a Sydney Bristow-level gunslinger, and a trembling faun—and also whenever she shows a lot of leg, which is obviously as often as possible, maybe more often than possible. Dushku, who is also an executive producer on the show, has already done wonders for her demo reel, but merely donning Sarah Palin drag to convey the personality of a tough negotiator in a kidnapping case will not cut it, and it will be a test of her abilities to reach the existential depths to which the show aspires."

Slate: She's Got Legs, February 12, 2009

It is part of Whedon's talent to cast actors and actresses he believes to be able to grow into a role. He has a remarkable track record of discovering talent (take Nathan Fillion and, my favourite example because it shines so well in "Terminatr", Summer Glau). The whole point of giving a tv show more than just 13 episodes is that it takes longer for both characters to evolve and actors growing into their roles and really fill them.
So, I have but one request: Give it time.