Honestly when I watch us play, without KDB making those risky passes, we would just be passing the ball around with nowhere to go. KDB is exactly what we need in our team. Without KDB taking those risks, yes we would retain more possession but then I'm convinced that we would score less goals and have less chances as well.
City without KDB would basically be, dare I say it, the rags. We'd end up with 0-0 scores week after week. Even in those 0-0 draws we had before, KDB didn't play well but most of the chances we had was the one that he created. We brought in KDB to create chances - score goals and give assists, not to retain 90% possession and be a glorified Michael Carrick.
You might mention that when he lost possession we pretty much got counterattacked every time. That's true, but we still got counterattacked last year even without KDB. The difference is this year when we're recovering back to cover a counter attack we look like headless chickens. Nobody seems to know where to go. At least when we got counterattacked, KDB would track back unlike Yaya that would just put his hands up to the refs asking for a foul and jogs back.