Madrid and Barcelona situation cannot be separated from injury problems, most recently Barcelona lost Lewandowski who suffered an ankle injury, follow Raphinha, De Jong and Pedri who were previously admitted to the treatment room due to various injury problems. Madrid also experienced the same thing, maybe a little better than Barcelona, because only Courtois, Militao and Arda Guler were injured. If both clubs have full squads, El Clasico will be presented ideal this season.
Barcelona's injuries are worse than Madrid's. With Vinicius back Madrid look stronger. Courtois got injured and Madrid got a replacement. If his injury had happened after the transfer window was closed Madrid would have been in trouble. Militao is the only injury that Madrid has right now that would be missed. Arda Guler has never played for Madrid so we can't say he would be missed.
Barcelona on the other hand have four out of six of their midfield and attack out injured. Pedri might be back before the classico but Lewy, Raphinha, and Frenkie might not be available.
I would have loved all players of both teams to be available so the Classico would be more interesting
Frenkie De Jong is the most missed for me, he wasn't part of that Celta Vigo game to control the ball and possession but Barcelona still found a way to win that game.
Though the list of players out Injured makes it more safe for Real Madrid to win whenever the date for that Classico comes up.
With important players around and also absent, Barcelona got the better of the game when they faced Real Madrid more than three good meetings. Barcelona showed them strength. Araujo is the man for me, he has been a up and kicking for Barcelona.
The Classico will have no Messi and Ronaldo do it won't be too intensed.