We need more Fire, Ice, Dragon, and Ghost types. Although, I sort of like that those last two are so rare. It sort of reflects their status as being valued/revered/feared. I guess you could say the same thing for fire types as their rarity is supposed to reflect the actual rarity of fire in nature.
An ice type that isn't so weak defensively. This is why I'm advocating an Ice/Fighting type.
Well still - given in BW there was only like four you could catch during the storyline I just brought up the one type example I could think of there lmao. Oh and I agree with more ice types with strong defences. Making them weak to focus blast would make them harder to take down so I'd like to see a few of them if possible :)