How can you say it's more of a x-men rip off if you never watched the 4400? Not quite sure the x-men was the first ever "humans with powers" fiction out there tbh.
Because I know the premise of the 4400. As for the X-men, the thing that made them different is that their superpowers were from their genetics. They were not aliens (Superman), humans with tech (Batman, Iron Man), humans that got their powers via accident (Spiderman, Fantastic 4, Hulk), or descended from gods, (Thor, Wonder Women).
Their entire premise was that their powers were genetic mutations and that people feared and hated them because of it as they represented a threat to homosapien as they were called at times homosuperior. That is the premise of Heroes. That the powers are mutations and that they represent a threat to homosapiens. X-men was clearly the most popular superheroes that had that idea of mutants evolving from homosapiens into possible a new species.
Not to mention the creator Tim Kring is great friends with Jeb Loeb, a long time writer of the X-men comic books. When he thought about the idea of superheroes but without the costumes and grounded in reality, he called his great friend Jeb Loeb. There is no way he could have consulted Loeb with the idea and it not be influenced by the X-men when the story mirrors the X-men and when some of the characters have powers that are pretty much the same as the X-men.
I am not knocking the show for being a rip-off, I thoroughly enjoyed it when it came out. My point was simply now that the X-men are on film and TV (Legion and The Gifted), there is little reason for me personally to want a return of a show that was essentially based on their premise. You try and bring out Heroes or Alpha now and all the comic book fans that watched those shows because the X-men weren't on TV are not going to watch now. TV is littered not only with X-men shows but also all the Avengers stuff (Daredevil, Luke Cage, Jessica Jones, Iron First, Punisher) as well as the DC characters which I won't name as I don't follow DC like I do the X-men and Avengers outside of the new Black Lightning show.