Indeed. While I would have preferred an orchestral piece, the intro theme for Seasons 1 and 2 was jarring, but not bad. When they updated it for S3 and 4 it was absolute garbage.
The one-shot intro for the mirror universe episode was absolutely fantastic though. They should have stuck with that one, or Archer's Theme, which has an appropriately Star Trek optimism to it, while still being a bit "pop"-y.