We've always known it was possible; the math was done when the new system was first introduced. I was going to type "the question is whether it's feasible for most fellowships," but that's not really the actual rubric here. Inno probably has an idea of how many fellowships (maybe raw numbers, maybe percentages) they think should be reaching the blueprint each week. If the number of fellowships achieving this matches with their numbers, then everything is working the way they intended for it to, and they're unlikely to change it.
So I guess the question, actually, is: does Inno intend for reaching the blueprint to be something within the grasp of most fellowships putting in some effort, or are they intending it to be something very rarely achieved? At the moment, getting the blueprint seems to be vaguely analogous to the Third Grand Prize in Big Events, and that might be their intention. If that isn't their intention, if they want this to be something most fellowships can get at least some of the time, then they're going to have to change the numbers because NO.
Supposing we're in the Third Grand Prize universe (as the available evidence suggests), there's definitely an issue up for debate as to whether or not the players feel that this is a reasonable decision, but that's sort of vaguely orthogonal to the question of feasibility/possibility and whether the system is working as intended.
Personally, I'm not sure of the wisdom of having some item appear in the game every single week but be perpetually way beyond the reach of almost all players. It doesn't bother me in one-time events, but seems a little harsh as a regular game feature, because the majority of players are going to either stop caring about the item entirely or perceive the situation as unfair (unless they're in a fellowship where everyone can go six rounds in at least six provinces, in which case they'll probably think the situation is perfectly adequate). The latter's not great for player morale.
I don't know, I still think it would be better if your progress looped from week to week. Non-tournament-powerhouse fellowships still wouldn't get blueprints all that often, but they'd get them occasionally, which makes things feel different. It kind of depends on what the blueprints can do besides upgrade magical buildings, though.
