Growing up with Super Mario RPG makes us always press A no matter what game we play. I have not implemented that feature as it take considerable time to add it. Perhaps at a later date I could revisit it.
Bo and Karn (from BOF 1) have more story in this version. Gobi also has a family name that runs a hidden shop in the game. The Shaman story also more in line with Karn. In 5.0 they have a quest and the new card game uses Breath of Fire 3 individuals/creatures. Nero references Breath of Fire 1 town, but in 5.0 that is added upon. That is all I can think of right now.