7-9 months of not being able to play for his club is certainly a very uncomfortable situation and his career will be at stake when he returns to playing because that is quite a long time for a player not to play and he needs adaptation, hopefully when he really recovers from his injury he can found his best playing performance quickly and became Barcelona's mainstay again, and it is understandable that Deco feels sad seeing the condition of his players because it will really affect the club, perhaps if Barcelona were not constrained by finances they would look for a replacement for Gavi in the nearest transfer market, but money and also supervision from Laliga might be an obstacle for Barcelona in the transfer market later.
Barcelona has been targeting a new plaer to replace gavi's position. I think that gavi's problem will not be a problem anymore. Xavi has some solutions to fix the problem faced by gavi due to the serious injury. Barcelona has been searching from its academy but the club was not even finding someone was capable enough to do that like gavi did. It seems like that this becomes a serious problem for xavi. Im waiting for him to give the best solution for this. Getting a new player from other club is the best decision that can be taken by the club.