Last December he had already made his debut and was around the first team, as I said, we didn't get him locked up early so he clearly wasn't a priority or we just presumed he would and let it slip which is partly why Txiki and Pep are probably annoyed.
As I have said, I couldn't care less if he stayed. He is not a long term solution to our defence and we would have bought anyway. Now he is leaving however he shouldn't be in the match day squad and certainly not getting game time.
Domenech says Txiki was trying earlier to extend the player but the player/agent thought it was premature and even then there was some unease about his continuity from City management - a return to Barca was not seen as much a factor as his 1st team chances with City. When it was clear he had the quality, I suspect City increased their pressure to extend
As I have said before, the Barca rumour never came credibly into the frame until June and even then it was initiated on the player's side which leads me to suspect COVID/confinement and being away from family/home figured into it to some degree. Plus, as I say, cantera kids always have one eye on an eventual return
For the player, it will have been a great experience to have played under Pep and learn from the best even if only for a short period of time in his development. He's ready for the next step in his career