I don't think it sounds very attractive.
Are people in SAS happy with the deal, from what I understand they got 3.5% pay increase compared to their requested 13.5%, and increase from 40 - 60 % for fixed roster.
It's simple, everyone should have the chance to get fixed roster within a period of 3 - 4 years, if you need more crew to make this happen, then that's what has to happen. This should have been part of the negotiations too, a long term strategy to implement a fixed roster pattern available for all.
Many ways this can be solved, more crews, more people allowed part time, but it requires active effort by the company.
I find it strange that other bigger companies then SAS, can offer their crews fixed roster pattern, at least in all their big bases, but SAS can't do it.