As a player in a region with a crit faction I have to say that it works very well. Yes, you can’t craft all the time because of the faction lock, but does that really matter? I’ve done 6 crafts since war ended, and that was without taking any notice of the clock. Yes it screws faction stats but no-one in my region cares about that. You go when you want, take a couple of minutes to craft, and then you return to your faction. As far as I know no-one has ever lost their place because it was filled whilst they were away. Even if that did happen it would be an easy enough situation to rectify.
Having no experience of crit sharing could someone explain the details of it to me? For example, if, at 10:30am one morning I decide that I want to try and craft two weapons how do I go about getting all the necessary territories under my control? Or do I have to wait until my faction decides it wants to go crafting? And then what if my faction takes all the territories, but because of time zones I’m asleep when that happen? Etc., etc. I don’t know the fine details of crit sharing.