If your idea is to make the graphics more appealing by taking the camera down closer to the battlefield I can understand you. That would make it easier to "sell" to the western public, yet keeping the games mechanics intact.
You should look into the gameplay of Crimson Shroud. It is still turnbased, it is even mimicing classic board games in that it has characters standing on base plates, but the camera is down on the game board making it more visually looking as a TPS.
https://www.nintendo.co.uk/Games/Nintendo-3DS-download-software/CRIMSON-SHROUD--691846.html
Personally I do not like the " rolling the dice" part but that is just me. I would also have the ability to shift the camera from classic fire emblem top-down to close-battle.
Remember, these are games that the staff of Level5 made on their "free" time. http://en.m.wikipedia.org/wiki/Guild_(series). "Attack of the Friday Monsters!" is a personal favorite.
