You have access to all the planned new recipe content but you are required as has always been the case to put in effort to obtain them all if that is what you want. You can't craft any DoH classes recipes unless put in the effort to level the relevant classes, you cant omni-craft unless put in the effort leveling multiple classes, you can't craft many of the star type recipes unless put in the effort to gain such things as master books, you can't craft most recipes or especially HQ unless you put in effort to gear up appropriately and you will fail to craft many recipes unless put in the effort to better manage your rotations. Now SE are making specializations actually worthwhile to many of us with this news...the same applies as always has though in that it would require effort if you want to craft all specialization recipes.
You are not locked out of anything that you putting in effort cannot enable/allow/access if you so chose. This really is not that different to how SE have always handled recipes and the requirement of additional effort to obtain them all only this time they are trying to push people to be more cooperative and work together, share burdens and help each other advance which are all good things while at same time benefiting those who wish to only focus on a specialization. SE adding decent value to becoming a specialist while at same time not stopping anyone else from leveling an alt to obtain every single specialization if they cared so much about having them all...simply by putting in additional effort like people have always had to put in to obtain more recipes in the past. Now I will have to wait to see how they implement it and such but as far as I am concerned SE are doing the right thing and they listened to the right people on this so it was not a bad request in the first place.