I haven't seen the whole episode, so I can't say for sure, but it didn't seem that bad. Not side-splitting hilarious, but OK.
I think this is similar to another show I watch that had a producer change. Everyone acted like it was an entirely different show and wasn't the same/wasn't as good, but there was barely any change aside from some awkward episodes during the transition.
Also, most of the people hating on this episode also threw the second half of season three under the bus, which was the most "Harmony" of the show. So that tells me they really don't know what they're talking about when they say it's not the same without Harmon. It also tells me I don't need to respect their opinions because the second half of season three was the greatness.
truth people forget although he was the head producer he did not write alot of eps so the only thing gone is his point of view.
That was prob way in this ep alot more balant with gags instead of leaving them low key. But that could have been them making fun of 90's sitcom.