Omni-Triforcer has a point, most people who are in their 20s have moved on. While some people haven't and go back to the golden age of when Ben 10's popularity spiked (Alien Force and Ultimate Alien) because most people who are in the Ben 10 fandom usually prefer Ben 10 during that time-span.
And I can kinda see Man of Action flip flopping with the idea of aging Ben and Gwen, I think at most they wanted to push for 14, not 17. But even then, some people can agree it was too soon to be done, and I think MOA is realizing over the years they now regret that decision.
If there's one thing I can agree with is your right about MOA losing touch with the Ben 10 fandom, they skipped the incarnations that people really liked and paid more attention to. Though Rebooting was their choice, they at least came back on board to make sure the show was done more their way, because we could have something much worse right now if they didn't come back. But people now don't want a Reboot, the Ben 10 fandom needs to expand beyond kids, and CN doesn't see that anymore, because they now think that kids won't understand a thing or something like that. But the point is, MOA has lost touch with the fandom, and rebooting it, though it was the smart way to go, its also dumb since you're not trying hard enough to keep the old fans there.
Ben 10's biggest problem is people want more exciting thriller episodes that get people excited for stuff to come, like the 200th Two-Parter, War of the Worlds, Vengeance of Vilgax, A New Dawn, Omni-Tricked, etc.
Shows like The Flash and Steven Universe have succeeded that because they give you a good payoff, and thought that's what the Reboot did at the end of the season. Now we need to expand upon that rather than most of the time getting episodes that revolve around filler or something that doesn't catch our eyes, we need less of that.
I feel like Season 2 is gonna open that door up for us with new aliens and the battle armors, and who knows, maybe even more new villains can debut this season. Because I can see Darkstar returning, Charmcaster and Kevin 11 debuting (maybe even make another 4 parter inbetween seasons for Kevin), and even newer exciting villains that really push the stakes, because that's what people want. A Ben 10 series where its "anything goes", and we push the stakes and surprises and throw things everywhere. I'm not saying we need a plot to do that, but we either need an overarching plot to the series, or we need to see Ben, Gwen and Max pushing their limits so we can watch these characters grow, and Pokemon XY succeeded in doing that because by now most people who have watched Pokemon or still are, they can confirm XY is one of the best of the series.
Another thing I'm going to say, every show is going to have its flaws, and we have to even agree the original had its flaws, but as long as this show can improve it over time, then this show might become better than UA/Omniverse, which means we're at least a step closer to getting more high quality episodes.