He didn't tank the season, it was already planned to be the last season. I think he was a great character, forcing Andy to make some life changing decisions. His relationship with Andy grew tremendously in that short amount of time.

I came in here to ask the same question about Bill B's lack of opening credit.

Curie, like so many other characters that ended up being regulars, were criminals or had bit parts in earlier episodes. Law and Order does this a lot too.
Anyway, I thought he did well as the jerk off captain. He ended up going out on a limb for Sipowicz which shows character growth.

In reference to Bill Brochtrup name credit, it's been over 12 years since I first viewed the final season of "NYPD Blue" and unless I'm mistaken, Brochtrup was credited on the original ABC broadcast of the series. I've recently re-watched the show on the DirecTV/Audience Network. It's possible that it may have been a post-production error on the part of the people responsible for editing opening credits. He is credited on season 11 but it looks like his name didn't appear like the other performers.
At the same time, some actors request that their names be removed from the title's credits for numerous reasons. I don't believe this is the case. This is just my opinion. I'm not certain if this error can easily be corrected by 20th Century Fox Television.

I didn't mind him. He did execute some changes and everyone needed. He held clark accountable. He got Andy to do things his way. He eventually came around to being a nice guy.