Even at dortmund was never convinced of him. In teams like Barcelona the winger has to be a "cut inside" type of winger.. One that tends to cut inside to shoot or deliver the killer pass.. Or cut inside to just demand the ball from Messi or other passers (like villa used to do and Pedro). Dumbele, even when he was producing those half assed numbers of assists, was actually dribbling outside before crossing like the 80's and the 90's.. That type of winger-work is obsolete. Or at best might work with a 9 like Lewa supported by other tall players... Dembele never made sense to me since the beginning.
All these excuses for Barcelona's scouting are fucking hilarious. Point to me to a video of Dembele confidently trapping balls under his foot back in Dortmund. Point to me to a video of Dembele brilliantly dribbling in tight spaces as we expect Barcelona forwards to do back when he was in Dortmund. Dembele utilizing skills a la Sancho/Cr7/Hazard in Dortmund. Confident, consistent finishing. Moving around inside the box fishing out for balls.
All you'll get in those Dortmund videos is his pace in wide open acres of space, him spamming crosses to runners (including Auba, who was an incredible striker with tons of positional intelligence, him scoring bangers, scoring scuffed shots, and fake shots. Exactly what he presents at Barcelona.
Dembele hasn't degraded as a player. He just had the benefit of shining in a league where relatively poor technique won't hold you back from stat padding, whilst playing for a strong team (relative to the league) alongside a great striker and second striker in Auba and Reus, led by a great coach known for pushing players well beyond their ability.
The deficiencies were obvious. People here pointed it out. Barcelona were simply idiots for thinking he'd "develop" and gambling on that chance with 140m euros. It was dumb back then and it's dumb in hindsight.
He quite literally lacks all the prerquisites for Barcelona forward. Not because of his injuries, he always fucking did. And we spent 140m on that.