Poch seemed to be very hands on. Whereas RK was more "professional" in the sense that I think he saw his job as to do the press conferences, coach the matches and run practices, and let others worry about the long-term plans, academy, etc. Maybe because that's the way RK is, but also maybe because RK never saw us as a long-term option and so only cared about his immediate job tasks and putting in a couple good seasons.
So in that respect yeah, I think MP (along with Cortese) really put their stamp on the club-- which in some ways worked to our detriment because it destabilized us much more when they left-- whereas RK just kept his bit running smoothly.
I think Koeman is a bad fit for Everton, honestly. He's not the guy I'd want to hand the keys of the kingdom to. But he was a good fit for us in our particular situation in 2014, partly because he didn't care and therefore didn't cause that much disruption to the core of the front office/admin staff (Reed, Krueger, Black Box, scouts, etc.) who we mostly did retain.
I think the time will come pretty soon when it's time for Reed and Krueger to go, honestly. Maybe another year. You need constant turnover IMO, to keep things fresh. You just can't have everyone leaving at once, or completely change direction on a dime. Slow evolution and a few changes each and every season...