I don't think like you. I tell you a little ...
I never used ML or MR; I found them useless. My leaders in the field were always AML and AMR; the team scorers and in fact always stole the goals from my ST.
But I had already spent many seasons with the worn equipment, without understanding the game idea, and I saw that I had to do a chip change. And that's where I tried to buy an ML and an MR. Since last season I am playing like this, and I have returned to fight for great things and obtaining great results.
Before, i played with a 4-1-2-3. Now switch to the classic 4-4-2, and in fact having an ML and MR, they give me more options to play with different tactics.
That is my vision, I hope you like it. Now these positions have become key in my team.