Maybe it's because I'm bad at it, but I do not enjoy playing Countdown... like, at all. It's just not fun. Revivals feel outright useless because it takes so long. I feel like it should be more like Rift; a single round, five to ten minutes, multiple detonations and regular spawning. This could be me being bad at Crucible, but I can't help it.
I'm with ya, it has way too many rounds and in competitive you play that more than all other game types combined. You see a certain map and you know right away it's going to be countdown. It's like Bungie is super proud of this game mode, like there's nothing remotely like it in any other game when it's been done before and done better. Overall it's just not a fun game mode, Bungie I love ya but this is one to get rid of.