Near every outsider that wants to deal with people DOES get tongues or access to it as spell, though.
And in fairness, if you were to take all of Evolved Undead, you'd be minimum 2,000 years old all on the mortal plane. Seems like a logical place to have a Tongues option.
Well god is stronk yes, but also has a lot of the power comes from moving pieces so it be possible to don't synergize too much and keep whitin the parameters. Will wait for sheet numbers.
Mostly it's the trivial resurrect/instakill/know someone's entire life SDAs that jump out to me as immediate problems (though that every ability scales with every level is also a sort of long-term concern). Like, look at what I had in the taint-game just by swapping cha to INT and focusing knowledge checks.