I understand its the 2 X SSAA but the bloom does help in some way.I like the HDR personally, but as for the statement in bold, no it doesn't. That the 2x1 SSAA that reduces jaggies in 2D.
This is how the bloom looks like on the 3DS screen. It looks really good.

I noticed some 2nd analog option in the menu. But still that sucks.Not as far as I can tell. Ironically, you can do it in MHP3 when playing on a Vita!