Eq2- and later on other mmorpgs : climb walls , it made me feel like and adventurer , both in open world zones and dungeons (not usable on combat ofc) .Eq2 the crafting was no rng and fun too, the housing is incredible u can even have your own personal island or Pirate ship , or mini-castle , lots of options.

FFXI- the world itselft , Eorzea cant hold a candle against Vanadiel , this one has way more wildlife , and change based around day/light , miss watching airships flying , birds on the sky ect, Npcs moving....., dont foget Volcano eruptions....lots of little things that made u go ....woah... the only thing that made me say that was the rainbow in hinterlands.
Campaign would have been awesome in FFXIV , enemies attacking zones , or player attacking enemies strongholds....that would be cool.

Gw2 - Inventory , and "fates"

Wow - Raids is the only thing left that has some quality , big raids with multiples bosses in huge zones. Instead of 4 arenas and that it...

Oh the new weapon quests looks amazing....U dont have to pay for it on the MB , u do quest with lore characters , "events" over the world / dungeons / and gain fragments ....in the end u enhance it while HAVING FUN.....thats how u do a "epic weapon"

Aion - Wind-Streams , air tubes that let u fly faster.