Again, so long as the desire for schism remained in the Orthodox Church, that was ipso facto heretical. Note, too, that the persistence in schism was the guilt of the Orthodox bishops and never the flock as a whole, who simply followed their bishops.
Once the Orthodox profess their desire to find a way to unity, they become in the Catholic Church by desire, and therefore obtain sacraments that ar enot only valid as they always have been but also efficacious.
It is fine to remain sceptical of what will come of all this, as you clearly are, but you cannot say the the teaching of the Catholic Church as regards the Orthodox changed.
Very poetic, but no such doctrine in the Church as "in the Church by desire for unity". Whatever you got that idea from, has no basis in dogma, doctrine, or tradition, it is a novelty.
All an Orthodox has to do to have efficacious sacraments is to become a Catholic, or as many Orthodox likely do in places where no Catholic mass is available, they accept the authority of the pope and have a willingness to submit to anything required to be called a Catholic. It's that simple. There is no need to invent another path.