I suspect @Araq and the other members that are on the payroll will have their own priorities.
As for me personally, I enjoy thinking about how we can make Nim better. Sometimes the most impactful changes require breakage and as we only now have a small time window[1] to make them I am eager to see what we can do in the time we've got. I agree that refactoring is important, but as you might imagine I'm not particularly excited spending my free time doing that. I hope to pick up at least one of the ideas presented here and with @Araq's approval implement them, I would encourage others to do the same for those ideas that excite them :) 1 - Thinking about it some more, I can see us wanting a model where an "upcoming-major" branch representing the new major Nim version is always there and where we can make breaking changes at any time. Maybe we should consider creating such a branch.