Yeah, sorry about that. I didn't mean to assert that having knowledge equates with having control. If anyone, anywhere has perfect knowledge then nobody has any control or any real power.
There's the rub. If there is omniscience, there are no unknown factors. That is what omniscience means.
If the question is 'Does the Maker have omniscience by its strictest definition?' (that it means you know everything about everything at all times, including yourself and everything beyond everything that we could ever conceive of, etc), then sure, he does not. Otherwise he would never have even bothered with Thedas because he knew he would have turned his back on it. Heck, even the claims of the Biblical God's omniscience is more of a sermon thing than anything you could find in the collected texts.
But I don't think anyone, in game or out of it, is claiming omniscience of the Maker by its strictest definition. I've certainly seen nothing in-game about that. So count me in the 'inherent omniscience' camp. I'm willing to go in the 'total omniscience' camp for other things, but not The Maker.
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Sidenote - when it comes to the Maker, I don't think we'll ever get absolute narrative proof that he exists, or at least exists as Andrastans believe. What may happen is a little bit of the pro side and a little bit on the con side about it with every game. Eventually we may learn of an entity strongly tied to (but maybe also separate?) from the Fade that may have created it all, but it may still come down to faith whether the narrative of the Chantry is the correct one about it all.
I mean, when it comes the Inquisitor, the 'Herald of Andraste', it may still end up true that the Inquisitor is the herald, the harbinger of the arrival of an Andraste-figure-of-some-sort, and it may still end up true that the events so far fit the believed-to-be Maker's plan. If it keeps going as generally expected, how is it exactly wrong?
I expect something along those lines. I don't think we're done with the Chantry if we get a DA4 - I just think the focus will change.