If armor skins were up to me? I'd have Rathalos, Nergigante, Deviljho, and Barioth armor for the male, then just whatever else for the 4 female skins.
Palico would be a huge disappointment for me, like adding Tails instead of Sonic, or Tifa instead of Cloud, etc.
For move sets there are many, many perfect ideas, a few that spring to mind, or any combination here of:
Great Sword - (Staple weapon of the franchise)
Tap B while shielding like Inkling to kick
Tap B while charging side smash to cancel into shoulder tackle.
Sword is sheathed unless attacking, not really gameplay impacting, just flavorful
Normals are various sword swings, hits reduce a sharpeness gauge, weakening further attacks (in the red will bounce of shields)
B sharpens the sword
Down B sets a Barrell bomb
Side B whips a flash pod down in front of him, stunning near enemies
Up B slinger grappling hook, ala Joker/World, or perhaps a drake swoops in and carries you up
Set a bomb, stun an enemy near it, charge a smash, hit enemy/barrel for tons of damage while being out of range yourself due to the blade size
Switch Axe - (Weapon more unique to the franchise)
Sword mode slows movement, but has harder hitting attacks, consumes meter
Axe mode is default and has more range, builds meter
Moveset updates depending on form
B changes weapon form, tap during specials/combos where appropriate, just like in MH
Up B that upward sword/axe swing that usually pulls your hunter off the ground a little, only in this case, off the ground much more, lol
Side B then mash B to do the continuous axe chop, or elemental discharge in sword mode consuming all meter and reverting to axe
Down B plant a pitfall trap
Weapon Mix - (More of a MvCI game plan with multiple weapons, perhaps not all/just a few, but still cool)
B bow or bowgun shot, potion drink that heals a little complete with long animation and muscle flex
Up B insect glaive vault
Side B duel blade flurry, or lance dash
Down B hammer slam, or hunting horn song buff
etc, etc, etc
I could go on with ideas forever.