"Klei retains full autonomy of creative and operations across all aspects of the studio"
I love this part of the official statement, great PR.
While Klei maintains control of those aspects, Tencent has majority control of who sits on Klei's Board of Directors who set those policies.
Even if there are caveats, clauses and golden handshakes in the contractual negotiations, there's no way a mega corporation who buys a controlling interest in a small company would give up the rights that having a controlling interest brings.
So in effect, while this statement is true, in practice it's almost completely irrelevant if Tencent wants it to be.
Edit - I'm not saying Tencent will change things, just that they can.