I understand what he is saying. I have two issues with Coombs argument.
First of all, I think he is confusing players/positions. DM isn't the position Yaya, Vidal, Matuidi and Ramsey. They are box to box midfielders. Totally different positions.
Secondly It is definitely not as basic a position as Coombs believes, ie. I don't think "most professional footballers" have the skillset required to be successful in the role. You need a high level of defensive awareness and impeccable positioning and tackling ability to be successful in it. You absolutely cannot afford to lose the ball or be careless with possession in this position. Also, the first pass out is the most important pass a DM can make. A wrong choice and the options going forward are reduced drastically. Not every player has the vision, (yes vision) and decision making ability to make this first pass count.
The label "pure destroyer" is a misnomer for the DM role in my opinion. Only the most limited players interpret it as such.. Eg Wanyama.
Who would you say is an example of your "traditional DM"? In my opinion, The epitome of a DM was Claude Makalele, who for me was so much more than a pure destroyer, Indeed I believe he was one of the early deep(est) lying playmakers of the game, though very few recognized him as such possibly because he rarely ventured past the halfway line, wasn't an expansive or elaborate passer, and wasn't interested in goal scoring. However, his primary role, which he carried out perfectly was to prevent opponents from playing through the middle and serve as a platform to launch attacks. He was key to Real's success during the first galactico's era, and absolutely vital to Chelsea's development into a powerhouse in English football. Legendary footballer.
Traveling from box to box, beating your man one v one, goal scoring, that's linked to another position entirely IMO.
Even Vieira, great as he was needed more reserved players like Giberto to clean up behind him whenever he embarked on his forward runs. In other words, the defensive part of the game was a shared responsibility, with Gilberto enjoying a larger share of that responsiblity (which was quite suited to his skillset), and this complemented Vieira's game perfectly. Two players, two positions, two separate roles.
A single player can't have it all. I see Coquelin as more of a Gilberto Silva than a Vieira/Vidal...