Favorite Change to FE Series

[JohnMichael]

Some of my preferences in order of importance:

1.) The introduction of the swordmaster class!
2.) The FE6/7/8/9 support conversations; I hope they bring them back. Mow Mow's right about how awkward they were to activate, by I just love that character interaction taking place, especially as the tertiary characters have little if any main story input after they've been introduced. How does the FE:DS system work?
3.) The arena in FE4; mainly because it's non-fatal, and you can use it all in one turn before doing something else.
4.) The FE5 capture system.