I think player (and agent) power has reached such a stage that managers aren't as important as they once were. The days of tactical genius or revolutionaries are long gone. Most clubs feel like they need a figurehead, someone who will get the players' respect so that they listen to the instructions of the various specialists working behind the scenes.
That's probably were Zidane's and Lampard's appointments come from. Oddly enough, tactical analysis (sometimes in-depth) is more wide-spread amongst supporters than it was 30 years ago, for instance. The irony being that the last tactical mastercall I can remember is Capello's AC Milan against Cruyff's Barcelona in the CL final 94. I haven't checked the numbers but I'd say that, say, 80% of managers play the same three-man midfield system, with some variations. This is why they keep telling you that the system isn't important.
These days, you need a guy who can keep egos in check, either through conviction (Klopp) or fear (Mourinho). That's what Deschamps failed to do with France this year and surprise, surprise, they're out of the Euros after one of the two guys involved in the bust-up missed a penalty...