Yeah you made some valid arguments there. Guess will see what happens in the reminder of the season. What irritates me the most is how Valverde easily discards some of our VERY expensive signings. He basically sees only one playing position for everyone and if that doesn't work fuck it, that player goes to bench or stands. He doesn't even try to incorporate players who have some difficulties adapting not to mention he won't ever try them out in some different position. Coutinho played as a LW, RW, LM, AM during his career and yet in Valverdes eyes he is only capable of playing LW?!?! Next game against Rayo would be a perfect opportunity to test him in midfield but that won't happen for sure since Valverde knows only one way and that way is ugly as it gets. Against Sevilla we played great second half in 4-2-3-1 formation and I bet he won't try it again so soon, maybe only in the case of emergency like we had in that game.
Yes, Valverde is simply not adventurous enough to play Coutinho in the midfield. Frankly, as other users mentioned above and as I have been mentioning far too many times, he is simply not the right fit in the midfield either. Nowhere near worth the absurd transfer fee that we paid for him or using him continuously over the likes of Arthur, De Jong, Aleñá etc. To be honest with you the few times that Aleñá has played he has impressed me more. Much more suited to our footballing philosophy.
Also have in mind that Valverde adjusted his tactics and lineup from the spring/early winter when we were conceding goals left and right. In the last 13 league games we have conceded 4 or 6 times only if I remember correctly.
A 4-2-3-1 formation would probably suit him the best by far and I might see him work in that formation if playing in front of guys like Busquets and De Jong or Arthur. Or Rakitic. A midfield of Rakitic (at his best) and de Jong (more mobile than Busquets), I could see work in that 4-2-3-1 formation with Coutinho right in front of those two. The problem is that Messi is not really a "right winger" anymore and constantly operates centrally. Ironically the position where Coutinho is arguably at his best when playing in such a formation. If played on the wing in a 4-3-3, Dembélé has to be sacrificed and our attack with Coutinho, a 32 year old Suárez and soon to be 32 year old Messi will have almost zero pace. It's not working much like that horrible Busquets, Vidal and Rakitic midfield imo.
However it all gets back to my initial points and the conclusion of him being a misfit, I am afraid, as obviously I would have liked to be proven wrong as that would have meant that we would have enjoyed a world class talent succeeding for us and being worth the money that we paid for him.