Filters don't give a higher quality image when the 3ds screen resolution can already fit all of these consoles 1:1. How can scaling and filtering be better than that? I'm afraid that if they get rid of 3d it wont come back in future updates.
Try it and see for yourself. LQ2X makes a big difference in the visual fidelity. You'd rather have a broken feature with obnoxious screen tearing instead?