True. The level of free will of the various classes of entities in the Bible isn't explicitly called out, but we know that when given a direct order, angels seem to have little choice but to comply.
He created time, and if He created time, then He exists outside of time.
Perhaps, but more than one person has 'been hoist by his own petard'. I wouldn't say that it necessarily follows that the creator of a system can't fall victim to the implications of his creation.
I think the problem with your understanding is that you think of God as both too small/weak and impersonal; my God is neither.
Not both, limited in the sense that He can't both create a rock too heavy for Him to lift, and lift any rock He can create. Impersonal only in the sense that He is impartial (or maybe He isn't, and He plays favorites)...
It's not exactly analogous, but it's kind of like saying that God's power is limited because He can't make a circle with corners.
To say that He is limited because there's nothing He can't do, which is what the "rock so big" problem comes down to, amounts, I'd suggest, to saying that the unlimited is limited by the definition of unlimited.
And even so, He chose in some way to be limited by the Incarnation.