Poison spell completely negates the need for CC troops. Especially at TH9 and below where you can easily bait the CC with a hog. On top of that, an extra 30 seconds were added giving you extra time to kill the CC troops. Finally, with dark spell donations any TH level can get a max poison from higher level clanmates.

IDK if supercell reads reddit, but I really think the spell needs a nerf. If the damage got toned down, and maybe the minus movespeed and minus attackspeed got a small buff, the spell would be more balanced. That way, people would be more inclined to use it in mid battle, to mitigate some of the CC damage to their troops. This takes more skill and strategy than the current way of using it, which is to drop it on the CC troops before beginning your attack.

TLDR - Poison spell makes CC troops useless for most THs.

Edit: I was wrong about 'most THs' but I still think it is OP at TH8 and TH9