In theory it shouldn't be too difficult. The Wii U's controller doesn't really do much on it's own, just streams from the system itself.
There shouldn't be any technical limitation issues to the 3DS acting as a controller asides from the lack of a second analog.
that is just pure nostalgia talking.
It is true that a Vita game would look better than a 3DS one, but 4 clearly looks better than Freedom Unite.
The PSP never needed a second analog stick for people to play MH.
it isn't necessary for the 3DS either (and you do not have to claw like the PSP).
If you've never played 3U on the 3DS, they added 2 additional camera control methods.
Digital D-pad is basically the second analog camera control but set on the touch screen, its position and size can be changed to suit your preference,
Target-Camera lets you set the L shoulder button to face the s...
That is a terrible argument. Megaman X started on the SNES but then jumped ship to the PS1, so what? 3rd parties can jump all they want if there is a reasonable benefit in doing so.
That isn't that big of an issue, I know several people who got the game and have no trouble without the add-on.
Even the old PSP games never had dual analog and people adapted to it, the 3DS games can easily be adapted to as it gives the option for a digital D-pad (whose size and position can be freely adjusted) as well as the target camera function on the L-button.
it's just the usual "if its not on my preferred system then it must suck" mentality.
No problem there, 4 was confirmed to have online play a long time ago at TGS 2012.
Black and White already did that, lower level Pokemon gain a significant exp boost from fighting higher leveled monsters.
And Audinos can give insane amount of EXP.