What Billy said.
New 3DS already has much better options for SNES emulation. No sense for me to go that path and redo what others have done and end up being worse off.
But I am really curious though, isn't PocketSNES / CATSFC already very good for New 3DS? I don't have a New 3DS so I can't say for sure.
For the most part, they're pretty good choices for SNES emulation on the New 3DS, although I find that fullscreen transparency effects slow down even the New 3DS a bit on CATSFC. I go back and forth between the two.