Not picking on you because everyone does it but Henderson and Milner are entirely different.
Henderson is one of the best midfield pressers in the league. Milner isn't. Milner is an excellent midfield passer, Henderson isn't - in fact he's been mostly horrible this season with the ball
Henderson is really good at keeping our defensive shape, Milner vacates his space to attack constantly and isn't particularly good defensively in midfield at all these days.
They're just so different as players the only commonality is they're both British, right footed and they both run around a lot
While this isn't wrong as such, it exemplifies what I find baffling about the LFC midfield debate currently, putting relatively small differences under a magnifying glass.
Regardless of who one prefers to start among the current midfielders, all of them fit certain criteria - they're all hard-working, versatile, two-way midfielders who are "generalists" rather than "specialists". Yet from the discussions, you'd think we had Carlton Palmer starting and Gazza sitting on the bench, chalk and cheese. Henderson and Keita are painted as complete opposites, when it seems to me their skillsets are at least as similar as for example Joe Allen compared to 2014 Henderson, or Redknapp compared to Michael Thomas, to go as far back as I can remember.
It's only in a narrow sense that Milner and Henderson are very different players, and I'd argue it's pretty narrow as well to think like many seem to do that in Keita and Oxlade-Chamberlain we have players waiting on the bench who have the potential to be transformative to how this team plays compared to the current starters. In the grand scheme of things, they're not *that* dissimilar to Henderson, Wijnaldum and Milner either. They all share the above-mentioned traits, and that's not by happenstance.
To me it just seems like there's a failure and/or unwillingness to comprehend how much importance for our chance creation Klopp, rightly of wrongly, places on qualities like intensity ("our identity") in pressing, off the ball movement and directness in the right moments, even in the games where we have the ball most of the time. We're not aiming to create chances primarily by being slick and skilful for ninety minutes, but to set up the conditions for getting opportunities, and being decisive in them. We mostly succeed in that approach, sometimes we fail, personally I wish the discussions would reflect a bit more in the case of both that that's what we're trying to do.