I am also not a fan of the Grounded modifier. It actually makes the game feel even slower paced and less varied than it already is. It also seems to proc at odd times, like when you're sprinting downhill or casting certain abilities (e.g., Shadowshot.) Most importantly, everyone just gets frustrated by it.

I actually think Blackout is a good example of a negative modifier. Everyone in my fireteam seems to have a good time when it's active, even if they won't admit it. We get a lot of jump scares from Thrall sneaking up behind us, laugh, stop to strategize after wipes, and just seem generally more engaged/immersed than we are when Blackout is not active.