The Mission type Daemon Incursion (Nurgle Infestation). There is nothing wrong with the mission type, thought I get that out there first.
What I am talking about is the warp portal itself. Originally I thought it was a placeholder for some type of cool in-game art asset for a Nurgle Hive that we had to kill other than a lazy portal... It great for the Chaos Legion Vanguard, but as a representation for Nurgle not so much.
If we start getting into other Chaos gods other than Nurgle for example Khorne, Tzeentch or Slaanesh. I would like to see each of their own style of Daemonic portal thing representing their god and maybe a mechanic on how to kill the portal differently depending on the Chaos God worshipped as well.