At this point, they exist in a larger universe, where the events of the back part of the season couldn't happen. The showrunners are irrelevant in the context of the existing universe.
They created and run the series. Its their vision, and one that would probably cause creator uproar (to the media) if their unique voice was upended all to shove this series in with undeniably weaker shows that do not have a trace of the drama or cultural awareness of this series.
At no point does asking for help make the title characters look weak.
Then you're missing one of the key points of the show: black characters (and a couple of non-black allies) being all about self-determination as black superheroes.Even after being officially recognized at the hearing, their life and identity fights continue. Having some watery crossover only makes the Freeland characters appear as if they--after the past three seasons--have not grown, Jennifer (and maybe TC) in particular.