I kind of agree with our opinionated OP. Rebirth was brilliant and if you weren't aware that Futurama had been off the air for the better part of a decade, you'd never guess it from that episode. It was Futurama unchanged, unfettered by time. It was not the best episode of the series but a great episode nontheless.
The came the second episode. Right from the start it was a reduction in quality - most of the gags were not Futurama gags. Don't get me wrong, it was a funny episode and I won't deny I laughed at it a couple of times, but it just wasn't /right/. Putting Leela and Zap in that situation at the end of the episode was, in my opinion, the worst thing they've ever done with the series. This episode was Futurama's "Principal and the Pauper" for sure.
Still, my hopes are very high for this season. If we see more episodes like Rebirth, this could even end up being one of the best seasons.