Definitely agree with this comment; it would be a major help if there was an option to only display the buffs or debuffs by other players which cannot be stacked.

I've disabled the display of other people's buffs because it makes it hard for me to make out which buffs or debuffs (such as Aero II) are currently mine, especially in larger-scale content like alliance raids where one boss may have dozens of buffs and debuffs active at once.

However, that is at the expense of knowing if I myself may be overwriting other players' non-stackable debuffs on the boss, which can lead to very wasteful and uncoordinated overall usage of these actions on everyone's part, since depending on which of the two options you use it is either very difficult or outright impossible to tell which non-stackable debuffs from other players are currently active.

I believe that—especially in anticipation of the upcoming savage alliance raids or even in consideration of pre-existing hardcore large-scale content like BA and DRS (but also all hardcore content in general due to cross-class actions such as Addle, Reprisal, and Feint)—such an option as Liam suggested would be a great addition, which I have been hoping for for some time and would love to see implemented in the future!