There are many ability descriptions of buildings missing with UP.
For example, some wonders have a certain additional technology as requirement. This isn't shown anymore with UP. Most of these abilities aren’t used with vanilla buildings/wonders, so you probably haven’t noticed or bothered.
I can’t provide a full list of missing abilities but here are some:
- HealRateChange (Totem)
- MinorFriendshipChange (Pergamon Altar)
- <Building_TechAndPrereqs> (Great Lighthouse, Colossus)
- <Building_UnitCombatFreeExperiences> (Flavian Amphitheatre)
…
For example, some wonders have a certain additional technology as requirement. This isn't shown anymore with UP. Most of these abilities aren’t used with vanilla buildings/wonders, so you probably haven’t noticed or bothered.
I can’t provide a full list of missing abilities but here are some:
- HealRateChange (Totem)
- MinorFriendshipChange (Pergamon Altar)
- <Building_TechAndPrereqs> (Great Lighthouse, Colossus)
- <Building_UnitCombatFreeExperiences> (Flavian Amphitheatre)
…