I enjoyed the ending montage but this season was pretty abysmal overall. Daemon's visions meaning Paddy Considine was back in it was good though. He pretty much held S1 up singlehandedly and his presence on screen is very noticeably causing a drop in quality. Most of the new characters and actors are wooden planks in comparison with only Alys Rivers being remotely interesting.
On the fate of the dragons:
Spoiler:
Kinda, yes. The ones with riders die in battle, then a mob of plebs storms the dragon pit and kills the rest while they're chained, save one youngling named "Morning", who doesn't live long after.
There's also a few wild dragons, but they fuck off and their fates are unknown.