The fact that you can’t easily see that a character is affected by an omicron ability in a particular game mode after 2+ months seems pretty crazy to me. Are you guys planning to address this soon? ...
There's only about a dozen characters with omicrons. Out of those there's only about 3 that affect each mode so if you are in GAC you only need to worry about those that have an effect in that mode. Also if they have the zeta icon they most likely have the omicron applied as well.