I feel like it'd be a waste to remake this for the 3DS honestly, if it's really gonna get a graphic upgrade and stuff i feel like it should go to console. I still play 358/2 on the 3DS to this day and i see no issue with it.
As for the main topic question, I primarily brought a 3DS for KHDDD, Legend of Zelda, and Pokemon Games so my expectations aren't so high. But i only have interest in buying old games that become remastered, excluding games that were 2D and being remade into 3D Lol.