You certainly seem to be one those Khusanov fans who seem to prop him up no matter what. Unfortunately, you also seem to fall into the category of simply overvaluing his pace which is great for recovery tackles, but Pep seems to want more than that from a RB position which in my opinion Khusanov is currently limited. For example, you can't honestly tell me Khusanov is better than Nunes in providing an overlapping threat on the right and delivering a quality cross for our attackers. If Khusanov is going to lock down the RB position he'll need to improve upon that as, even against 10 man Napoli he simply recycled the ball backwards.
In my opinion Khusanov's long term position would be CB and at the moment Pep includes him at RB as our escape valve against teams who excel in the counter.
There's one thing I will agree about Khusanov when fit he's better than Rico Lewis at RB. As you said suggested though he has time in his favour.
You're mistaken, I don't blindly support him. I know the player's strengths and weaknesses, having seen him play about ten times, notably against PSG in the cup with Lens and against Arsenal in the Champions League, to name just two matches against a solid opponent before you even knew he existed. I'm very comfortable talking about Cherki, Ait Nouri, and Khusanov because I live in France and have followed Ligue 1 for years.
I don't overestimate his speed. Everyone was impressed and pointed it out, including Pep, hence his starting appearances against Manchester United, then Napoli, then Arsenal, and even in central defense against Brighton. Before his injury, since the start of the season, he had started in 4 of the 6 matches (excluding Wolverhampton and Tottenham). It's strange that Pep prefers Nunes and his runs on the wing so much, which I hardly ever see (none at all in the last game at Villa Park, for example), to the point of not having started him once in the first 6 games before Khusanov's injury; he even preferred Rico Lewis at the start of the season.
Is Nunes more skillful than Khusanov with the ball at his feet? Thank goodness, it seems he was an attacking midfielder at Sporting Lisbon and Wolfsburg, it's the least one could expect, even if Pep considers him "a player who lacks the intelligence" to play in his position! But I very rarely see the added value of this footwork. On the other hand, I know he's cost us points defensively, including this season with his stupid gesture of trying to hide his face with his hands, which led to a direct penalty.
You'll never change my view of football: a defender must first think about and execute his primary task, which is to defend, and then an attacking contribution would be welcome. That's what Walker did wonderfully well for years, recognized here and all over the world as a legendary right-back.
Again, we'll talk about it again in 3 or 4 weeks when Khusanov has fully recovered from his injury and regained his physical form.