To the Christ bit: Planning. Not guessing. Planning.
Now I will answer each question in a random order. Starting with:
He's always got a plan I bet there were some Egyptian conversion happening in those days. (Again their choice after seeing what He could do)
That would be all fair and good, but that ignores a really major problem. Judaism isn't about salvation in the sense of proselytization. I've never met an Evangelical Jew, and I bet there sure weren't any back then. The point of Judaism is living to serve God, not to convert everyone you can. Converting to Judaism is actually a long and fairly difficult process, as they often tell you "You probably shouldn't do this."
(The above information is from my friends who are Jewish)
Anyway, this point is beside the main point of your post.
How much control do you think God has?
Control and knowledge are not mutually inclusive things. For example, a programmer has control over his program, but he doesn't necessarily know everything there is to know about the programming language he uses.
Or you may have control of a car, but may not know exactly how the car is designed and built.
Why can't we have free will?
If God truly does know everything, then free will is nonexistent. If you don't believe me, allow me to explain the paradox.
(See below for a more concise form)
Suppose you have a choice between going to a university or a community college. Further suppose that God knows everything about everyone ever. You have the illusion of choice, because even though you think you have the ability to chose, you don't. If you chose something that God didn't know, then God wouldn't be omniscient, would he? If God knows everything, then he knows what you will do for every single choice you will ever make. If he knows all this, he must further know exactly everything that will happen to you. He essentially has a timeline of your life before humans even existed. So tell me again, how can we have free will here? I think I've demonstrated that if God knows everything, we do not have free will in anything. We may think we do, but if God knows everything, we very obviously don't.
In simple terms:
(1) If God knows in advance that X will do A, then it must be the case that X will do A.
(2) If it must be the case that X will do A, then X is not free to refrain from A.
From (1) and (2) it follows that if God knows in advance that someone will take a certain action, then that person isn't free with respect to that action.
Think of the hard headed Pharaoh with the plagues of Egypt. It took him a while to let the Israelites go, but he chose to in the end. God planned all of that.
Hmm, interesting. You seem to have contradicted your argument yourself.
Let's apply my model here. If God knows the Pharaoh will not let the Israelites go until God has cursed Egypt with ten plagues, then it must be the case that the Pharaoh will not let the Israelites go until God has cursed Egypt with ten plagues. If it weren't the case, then God wouldn't really know, would he?
If if it must be the case that the Pharaoh will not let the Israelites go until God has cursed Egypt with ten plagues, then the Pharaoh is not free to refrain from letting the Israelites go until God has cursed Egypt with ten plagues. If he could refrain from doing so, then that would mean that God didn't know the outcome, since there was a chance God could be wrong.
So my point here isn't that predestination or free will are "Right" or "Wrong", but attempting to say that we are predestined AND have free will results in logical fallacies.