Ground beating fire is fine. It doesn't have to beat the psychic part of Fenniken. The only problem is Froakie and it's typing.
I was saying that Grass/Ground is the sort of type you put in a starter if you're trying to set up a double triangle, like, oh, say, the fourth gen did. With Grass/Ground. And that if you don't want a double triangle, then Fennekin would have to pick up something Ground-resistant in its place, but no one expects that.
And that whatever you feel about starter triangles, GameFreak seems quite committed to them. I again bring up Mega Charizard and its lack of Dragon type. While the fad on this board is to say "Charizard is NOT A DRAGON LOL", be honest and tell me that, if Charizard was introduced this gen instead of five gens ago, you'd be stunned when it turned out to be Fire/Flying. Thing is, Fire/Dragon isn't weak to Water - and with Mega Venusaur getting Thick Fat, Charizard needs that Flying type in order to keep the advantage he's supposed to have.
With the leak, anything besides Grass/Dark and maybe Grass/Fighting is pretty much moot anyway.
Creator of Jay's Journey (see quote!) "It's not ten years old! Therefore, it sucks!" - Nostalgia whores everywhere