Version 1.1, Windows 10, gotcha and health values as the only noncosmetic mods.
The iron skin DE shows buff popups at the map start objective flyby, revealing the locations and number of mechanical enemies.
In addition, it seems like a bug that the only tactical DE which shows as a buff (green chevron and textbox on enemy highlight) for me is ADVENT scopes. Either they all should or none should, as the scopes do not seem distinguishable in nature from, say, veteran troopers or aggression.