I found it humorous how Ben once again used Articguana for the "first" time, at least from his perspective. I also would've liked to have seen more of 11-year old Ben adjusting to all the new aliens he has access to now. I wish they had made this storyline a two-parter though, so we'd have more scenes between the Ben's and the supporting cast of their respective past and present. Luckily Paradox and Eon lucked out in that regard. Some are improvements, while some just seem unnecessary. Omniverse, at least to me, had been pretty 50/50 in regards to redesigns. I have to say, I think both his and Paradoxes new designs are far better than how they originally looked. Seeing Eon again was surprising, especially considering how convoluted his origin is, but he was used effectively here. We have 11-year old Gwen freaking out over 16-year old Ben actually being nice to her, and present day Gwen arguing with 11-year old Ben like they were kids again. The time-switched Ben's was actually pretty neat, especially when it offered up some great interaction with the Gwen's.
Really, really, good episode of Omniverse.