Uh, it's a DS game. If you have a problem with these two things specifically, maybe you should sell your DS, because there isn't any sort of magical "beautiful high-res 3D graphics" mode that Sega decided to just turn off. This is how DS games look. And for a DS game, it looks pretty nice and runs smoothly.
The controls are a bit weird, though, but not unmanageable by any degree. The camera is the PSO camera. If you've played and enjoyed any amount of PSO over the years, it doesn't take much to get back in to the groove of using the camera-recenter button.