Be honest, the biggest bug that I want to see fixed and the feature I want the most, especially since a lot of people on here have Japanese N3DS units, is that the ONLY way currently to play a game region free and in English(or whatever language you prefer), is to play it off the Red Card.
I want to be able to install a region free CIA and have it play in English and not Japanese. Mind you, these are the same CIA files that I've installed on my old USA XL 3DS and for a few people and they all play fine in the correct language. But, on the Japanese N3DS, even made from American ROMS I dumped(I dump all my own carts), they all still play in Japanese in CIA format.
It'd be nice if that was fixed, as I don't believe Region switching the EmuNAND is really at a point that it's feasible for everyone and I don't think there's a way to change the system language to English on the main menu.