Interesting. I ask because, apparently a bit similar to you, I'm not such a huge fan of Coutinho.
I find him (while he's obviously a fantastic player) to be bit overrated, as I don't think his overall game is world class. As you say, he's not goot at controlling, he's not a great playmaker and he is a bit too much of an ego player for me. Makes for unbelievable YT compilations, of course, as he scores wonder goals every other week.
So I ask, because for me, he is doesn't have Iniesta's abilities at all. But then it's probably futile to look for a like for like replacement for an one of a kind player, just like it was with Xavi. All in all I would say I agree with your estimation, exccept that I think Valverde should be given credit by Barca fans.
As for the move happening, I've thought since summer that is was directly contingent on Liverpool getting Lemar as replacement. Coutinho wants the move and I don't think Klopp wants to force him to stay, but it's also reasonable to only let him go once you've secured a satisfying replacement. Lemar would be that. The moment that deal is happening, Coutinho's is happening.