Don't get me wrong - I love Endo and have been nothing but positive about him even when others on here were writing him off, but there maybe other reasons as to why the team looks more cohesive recently, such as Gomez at LB or the upturn in form of Jones and Konate returning at CB. Multiple factors affecting the whole.
The stats however are indisputable (those I posted above vs Endo are for the season so far, not a one off match, so highly indicative) these aren't padding, but to be fair in most metrics they aren't that far apart, almost identical even : that said Mac's stats (and so likely Endo's too) are amongst the best in the PL (amongst 6s) for recoveries, tackles+interceptions and passes blocked and you don't get those half season figures by often being out of position as some are suggesting. We are lucky to have them both.
I can't explain why people 'see' Endo as better, maybe because they are more focused on him due to the early criticism and so appreciative of his improved form whereas Mac goes under the radar except when he makes a mistake, though if I remember correctly he gets dribbled past twice as much as Endo (twice vs once per match?) so there is that as a more obvious defect. However the stats show them performing almost identically.
The more I see the stats & performances (of both) and see where we are as a team the less inclined I am to believe Klopp will sign another DM to 'free up' Mac from the #6 as some are suggesting.
When the stats show both Mac and Endo out-performing the likes of Rice (I'm discounting Rodri to an extent because City play a 'controlling' game which would naturally reduce his numbers, he's still the best for me), and we have Szobo, Jones, Elliott and Gravy for the other two slots, I'm not sure Klopp will see that area as a position needing to be strengthened.
As for Endo, Mac and Jones as our midfield three, it may indeed work but it shouldn't be our starting three unless Szobo is injured or needs resting. I would love to see Thiago, Szobo and Mac (LM) though before the season ends.