Just going to point out that even the weakest dragon...is still a motherfucking zombie dragon which now means The Wall is no longer a nigh impenetrable barrier from the north facing side. The Night watch is fucked.
Or the entire army could be killed in a single second, since they introduced a a new dues ex machina where they all die if the night king dies.
This entire "War vs the dead" could literally end in the next episode if they wanted.
Except now the Night King still has an undead zombie dragon mount that nobody except the white walkers currently know about and the only scorpions are still in King's Landing. At the very least, the Wall is most certainly going to be breached before that plotline gets resolved.
which is dumb in on its self. Why wouldn't they assume it'll get revived?
Also you only need to use spoiler tags if the episode hasn't aired. ---