I agree, I would love a similar number of outfits for every characters of the roster, no one excluded (however I think that quality is better than quantity: Bayman's vestiary of Doa5 compared with his previous ones work perfectly like example)
Anyway if I have to give a priority for the male ones based on my preference, surely I would like to see overall again Ryu's face with an umasked outfit for him (like his old classic one from Doa2), then a more original outfit for Gen-Fu (like the old "Elf Man" or" Master Muten" xD), at least one Ein's outfit for Hayate (but I hope always in his return like a DLC... a man can dream), Eliot's C2 from Doa4. Also some casual oufits for Zack from Doa2U would be nice.
PS: I would like to see also a grey palette color for Alpha 152 like a tribute to Dural from Virtua Fighter, off course the original inspiration for the character.