In fact, that's just what Margaret wasn't going to do. She was going to jump it to 2382 and keep it there, and any fill-ins of the gap would come at some later time. But as you say, the new editor could do things differently.
I don't see a contradiction. If the plan was to jump ahead
and to continue the story in 2377 and the intervening years, then that's pretty much what I was getting at.
The point is, you said they must follow up on that new arc "immediately," and I gathered that Margaret had no plans to return to the 2370s anytime soon. The plan was
not "to jump ahead
and to continue the story in 2377." The plan was to jump ahead, keep the story in the 2380s, and eventually, at some unspecified future time and in some unspecified form, provide some explanations about at least part of what happened in the interim. Filling in the gap was not a high or near-term priority in this plan.