I’d personally like to see more of them. For example, for most of them, we don’t know what were the reasons that made them not only turn to the dark side but also be willing to hunt down and kill their former Jedi partners. Was it just to assure their own survival or did they have any other motivations? How did they feel about not being Jedi anymore but technically being excluded from the Sith hierarchy?
I don’t think we’ll see another Inquisitor as a protagonist after Fallen Order, but I’m hoping to see them return in The Bad Batch or even the Kenobi series. Any of the stories featuring Inquisitors should be set before ANH, since Tarkin is confident that Vader is the only remaining Force-wielder around.