CT has a good recap of what happened. When they realized Jakobsen was out of it, the DQT train slowed down. To me that's pretty clear evidence that they went too fast initially, thinking that shaking off the other teams was the key to taking the sprint, not keeping Jakobsen safely tucked in. Yes it's possible that he might not have had the legs to finish it off even if he didn't have to close any gaps, so by the strange set of circumstances they ended up with a good outcome despite the last second scramble.