Rescued from the Scrappy Heap: A lot of players warmed up to Vaan and Penelo over the course of this game. Since the rest of the original cast spent most of the story occupied with other matters, Vaan and Penelo had a chance to shine as more than just Tagalong Kids, and things that were previously All There in the Manual became important character moments.
Feolthanos and his mooks levelling up to Level 99 if you do all the sidequests.
They Changed It, Now It Sucks! - Revenant Wings is totally different from FFXII. It's an RTS, the storyline is classic RPG fare that focuses upon Vaan and not the adults, few locations return from the original, and most of the plot and events have nothing at all to do with what happened before. Ironically, it's a sequel to a game that got this exact same response.