I posted the material. I stated clearly that the Orthodox have valid orders and apostolic succession. What I added though, is THE MOST IMPORTANT PART: their sacraments are of no efficacy, they are useless to the recipient, if he is in the sin of heresy and schism. It is like a Catholic receiving communion while in a state of mortal sin, it is useless, not efficacious.
Re: It condemns the Orthodox Churches not for their doctrines — which are indeed orthodox
They are condemned for schism AND heresy. Thy have always been in heresy, that means some of their doctrines are not orthodox, they are heretical.
That fact puts a damper the rest of your speculations, as to why the Russian Orthodox are doing this.
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.