I believe then, that it would be in Squenix' best interests to just let the man do his thing. A Dissidia on a home console has the potential to outsell any given new entry in the series.
Exactly. The reach would be greater and who wouldn't want to play a console Final Fantasy fighter? PS4/XB1 would have a wider reach than a PSV release, at least, and I think the game would be hindered by the 3DS. There is really no downside to a console Dissidia game except a lack of mobility (but if you have a PSV you can just remote play it)
Also I think the gameplay would benefit from all of the extra buttons on console controllers. My hands always felt cramped and limited when playing on the PSP because it always felt like there should have been better camera controls for a fighter with a 3D map.