Haven't heard about that one. Emulating a PS3 seems a bit too early when I last checked about that. Surprised on Sony for that one since they never said anything when PS2 was emulated, so why now.
Ah hm, haven't tried that yet. It doesn't seem like it has any online function (least with the latest one I downloaded). It's still pretty new, last time I tried DOAD via the emulator (month ago), it was unstable, glitchy, freezes, slowdowns etc. Now? it's a bit better. The matches are running at stable FPS but the character select screen and main menu runs pretty slow.
It's running at 59-60fps. Occasional drops here and there (50-55-59). I could be quite clueless in this but I don't see a 3D option in (is that's something that's automatically disabled even on first go? curious). It's pretty limited in options as well, don't see a graphics output nor FXAA.
There is definitely slow downs on the main menu and character select screen. Literally 40-48fps. Training mode runs pretty solid, but I'm also limited on controls as the emulator hasn't added a control feature to use stick/pad. Stuck on Keyboard mode pretty much.
3D toggle wasn't an in-game option. There's a little slider on the 3DS itself that raises or lowers the 3D effect depending on how you set it. If the slider is all the way down, the 3D is off completely.