Reasons to support this are as follows.
*Some characters like Julian and Sheema had unique models and palettes. No characters have this in the DS version.
*Weapon types looked different in battle animations. For example if Marth used a killer sword, it would appear as a striped sword and Marth would be use it differently then the rapier. In the Ds version All weapons look and act the same in the battle animations.
*Fancier backgrounds like a bridge appearing in the battle animations if you fought over one.
*The Fire Emblem is actually seen on Marth's battle sprite, while in the DS version, you just have to take the story's word that he's wielding it.
*Characters stay in place after their turn, while in the DS version they instantly return to their spot.
*Cooler critical animations like the hero animation.
Honestly a remake is supposed to have better graphics!
:(