Well technically there is 2% of the atmosphere not listed so it could still be Water. I certainly wouldn't have pegged it for a WW though, and I have seen a great variety.
Exactly this. It's basically Venus, but but with less CO2, colder, and before the water oceans were boiled way. With all that volcanism, it is just a matter of time though unless the star is so cold that it's already at/near thermal equilibrium.