In the vanilla epilogue, Alistair always wears Cailan's armor, even if he's not king, and Leliana is hardcoded to wear studded leather if she's hardened. 
This mod uses scripting to place companions in variable outfits in the epilogue depending on choices and equipment they wore during the climax. This affects both the Post Coronation and Funeral versions.

Alistair
Warden Alistair wears different outfit in the epilogue. 
The outfit is pulled from new UTC file epi100cr_alistair_warden.utc. This mod is fully compatible with any UTC file, just rename it to the appropriate filename. Only the armor is taken from the UTC, nothing else matters.

Leliana
Hardened Leliana in new outfit in the epilogue instead of studded leather. 
The outfit is pulled from new UTC files: epi200cr_leliana_hardened.utc. This mod is fully compatible with any UTC file, just rename it to the appropriate filename. Only the armor is taken from the UTC, nothing else matters.

Oghren
Oghren wears the armor he wore during the Climax.

Wynne
Carries the staff she wielded during the Climax. If she was not using a staff, she will carry the Enchanter Staff.

I did not include any edits for Zevran, Sten, or Loghain as I found UTC editing sufficient for their appearances.

Requirements:
The provided Alistair and Leliana UTCs require makara5656's Thedosian Grey Wardens and tmp7704's unique light armours, though these aren't necessary if you're using your own UTC files.

Installation:
drop in override