That Vindicators episode is probably the weakest R&M episode yet. It's not actively bad, but it's not particularly funny, and there was some seriously iffy characterisation going on. Rick is now dangerously close to being Flanderized, which is quite concerning three seasons into the show. The superheros were more frustrating to watch than enjoyable, since they were so hostile to everyone including each other.
The ep has its moments ("half-a million ants and half-collapsing star", Ghost Train, and Noob-Noob) but otherwise it was fairly predictable, with an incredibly lazy ending. And I much as I love Noob-Noob, he is essentially a pallete swapped version of Mr. Poopybutthole. The absence of a B-story was palpable, and the lack of Jerry this season is hurting the show (though the next episode looks to rectify that). I actually like the first three episodes, but something about this season overall definitely feels off.
It feels like they're trying too hard to please the audience. They need to get back to what made the show great in the first place: Just making shit up as they go along.