The game is already great. I'm a huge fan of the SNES Fire Emblems.
The story needs to be told better and situations should appear. Like when starting a chapter you have the map, then convos, enemy killing someone or attacking. Like Chapter 1 of Shadow Dragon. Character personalities is a MUST for entertainmen example would be Shinon from FE9-10.
Stat caps need to be reorganized. NO forging Brave weapons!!!
Marth is ok just needs Ike's FE9 caps.
Skills optional.
More chapter endings rather than Sieze, it gets too repetative. Bring survive, rout, escape, and protect back.
Let Marth mount for big maps. Dismount maybe.
Anima-Light-Dark.
Reclass was desent. So you don't get f*** if a Fighter(Cord) ends up with 24 Spd as Warrior.