I haven't really had any problems with the E-E crew. I know it took a little while to get a consistent crew, but I liked what we had gotten by the Typhon Pact books. There are still a few characters who seem that it would be nice to see more of, one of the biggest being Faur. She's been around since Greater than the Sum, but at this point she's little more than just a name. We still gotten much development for the new counselor Hegol either, but Councilor's don't always play a big role in the stories, so that one doesn't bother me too much.
As for the rest of the cast, I've like what we got with Chen, Choudhury, and we've gotten some nice material for Taurik. Dygan has also been another standout, and while she's hasn't been a prominent as a lot of the other characters, I've liked what we've gotten with Elfiki.