One thing i like and what people seem to misinterpret is ''messidependency''. It's very good to make a system, where Messi gets most of the shots both literally and as a principle. Although our midfield is quite shitty, the system works in a way that gives Messi a lot of opportunities to make difference, which was never the case under Lucho, where Messi basically had to brake the stone walls to make something happen and, obviously, it was hard even for him. The ball movement, the geometry of the formation and movement is much better now. If anything, we should use Messi as much as we can in these final years of his prime so departue of Neymar could be indeed blessing in disguise. Despite obvious talent, Neymar isn't and never be as decisive for any team as Messi can be and his presence mean't a lot of futile plays without effective end product.
Obviously, we will be in the world of shit after Messi retires/declines. Not only Barca, but football will never bee the same without him. Godammn, he's like a drug. The aftermath of his departure will be like extreme hangover that goes for several days.