First, great thread idea Asam. Holymoly and I were complaining about this very thing (Kopenhagen too)!
Second, we might consider baby Masch ---- Romero (although there are lot of ideas to consider). Could Jetro Willems play there as well?
Anywho, as the mods have said, this is not about individual players but the idea of what a DM at Liverpool looks like.
So, it appears we are just scratching the surface of this question. Lets get more precise:
1. What does a top rate Defensive Midfielder do?
Role #1 - Detect, Destroy, Distribute
Role #2 - Organize the midfield, Protect Back 3/4, Big Communicator
Role #3 - Provide a Physical Presence (Wins Duels - Air, land, or sea (see the Tevez ass duel with Rio)
Role #4 - Changes Point of Attack - 1st Attacker & Reference Point for Possession (plays simply)
Role #5 - Helps GK/Def play out of the back, Shows into space, checks out of space
Role #6 - Delays Opponents Transitional Counters
Role #7 - Avoids getting stripped/pressed or losing ball in final third
Role #8 - Tracks runners trying to unbalance the defense
Role #9 - Falls into the CB role when needed seamlessly
Role #10 - Accomplished in tackle decision-making scenarios
2. What does Brendan want in a Defensive Midfielder? How does this jibe with his style of player and what he wants?
Fill in the blank ____________________________
3. Why might Brendan consider a defensive midfielder of old limited? What is he trying to accomplish --- mobility, fluidity and less stagnant positionality?
Before we can answer this thread's thesis question, we should really examine what Brendan has done and why he has done what he has. I certainly like some of the responses on this thread --- as there are some real studs I would love to see in red. But, we should delve into the reasons why managers utilize them and why others do not.
In one way, Matic might be more important to Chelsea than most anyone (Costa & Courtois notwithstanding). What other teams are driven by their protectors (Southampton? Arsenal got better when Coquillan started playing there).