Xavi made the right decision. I am now convinced he'll be a great coach one day since he showed to all of us that he makes his decisions with his brain and not his heart.
I am not sure if he'll be ready or not this summer but it would be stupid as fuck to take over in January when he can't make any signings and when it's basically impossible to raise physical level of the team.
He will come sooner or later and he will succeed here, I am almost sure of that.
Sure he'll come at some point as well but still think he could've joined immediately. Mercato is coming up so there's a chance to sign 2 good CBs + one attack focused midfielder to complement Arthur & Dej + there's also Puig & even Grizzi who can be used in MF
Not as worried as some about the wings. Demb is recovering and we've got Fati & Perez. Go 4 3 3 with Messi in CF, I know he won't like it but picture his perfect first touch and finishing on the receiving end of quality passes and you'll get tons of goals.
It's true conditioning won't improve overnight but the sooner you start working at it, the better. And it's not just the phys, Xavi could incorporate loads of drills to restore a faster, fluid Barca football. 1-2s, triangles and all sorts of new cool shapes lol Dude's a perfectionist! He'll have them perform so many drills till the passing and movement becomes automatic and players would know there mates positioning 3 moves in advance allowing for quick passes and runs into gaps.
Getting a head-start for next season will also help plan for the summer signings. If no Xavi or at least any tough interim coach to do the clean-up, we'll just get more of the same with players getting slower, lazier and more complacent. Cloudy with a chance of bombas!