Dragon honestly feels like a pointless objective to go for.
Since the dragons takes time to stack and games are so very short now it feels like Dragon is severely outclassed by the Herald. The stats are nice and all, but they are completely unnecessary because of how quickly towers go down. I don't think I've had a single game in patch 5.22 where a team could get 4 dragon stacks either, let alone 5.
I can't imagine how much weaker dragon will be once the minion changes happen and games end even faster.