Looking back at some of the older episodes, the jokes on Futurama have always been hit and miss, mainly because they try to pack a gag into every line.
The new episodes might have slightly increased the miss:hit ratio, but they've at least confirmed that Futurama is still a damn good, albeit not perfect, show.
Well the same can be said for just about any comedy. Not every joke is going to make you laugh. I don't think it's any secret that the new episodes aren't on the same level as the initial run, but they're still good, and I think the last two in particular made up for that with having really nice emotional, character driven storylines.
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"Not only is pizza attractive and charming, he also has a huge penis." - Awkward Smile