No, no, no, it still works. What you're seeing are the new effect graphics on you instead of on your target. Engineering Team still works as I was using it in STFs right after the patch today and still got the "7239" green floaty text above my target, and their hull points went up.
I did try and cast Tac team on a teammate and saw the same thing: effect graphic on me. I didn't notice if my target actually got the effect, but it looked like it killed the borg boarding party.