Why would an all powerful God communicate with us via written word?
It was verbal, he taught Muhammad pbuh the Quran verbally, through the angel Gabriel, it was only ever written down so it doesnt become forgotten.
And through ancient scribes? And in a language we no longer speak (in the case of Christianity, Islam escapes this one)?
Interest point. Islam has the nice and simple answer to this. The books revealed to prophets other than Muhammad were only ever meant for those prophets and their people. So the text revealed to Jesus was only meant for the people of his time- so it doesnt matter that no one speaks that language anymore because that religion was not meant for us. The religion meant for us is based on the book revealed to prophet Muhammad pbuh, which was sent to all of mankind until the end of time, not just to a certain people of a certain time.
It is interesting that you should note that Islam escapes this one, it nicely highlights how Islam was meant to be the religion for the rest of time.
And in a form that can be interpreted in conflicting ways?
Not always. The most important things will almost always be interpreted in the one way. It is only the small details will vary. I think you need to be more specific with this statement.
Wouldn't a truly all powerful God simply have us know what he/she/it wishes us to know? This would not overide free will as we'd only have the facts and we'd still be free to act upon them as we wish.
How do you want Him to do this? He choose to send His Message with people. Through his messengers He let us know exaclty what he expects of us.
He also supported it by something called 'Fitrah'- the natural inclinations of humans. For example, cleanliness, the need to worship only one God, decency etc are all part of the fitrah.
If you mean why didnt He teach us via a more supernatural means, well He did give many of his Messengers miracles. Prophet Jesus brought people back to life and people still didnt believe him!! Prophet Moses turned his stick into a snake, He parted the sea, he had all types of miracles, and yet people didnt believe him.
Really I'm not sure why you want to have some other method? I dont understand what your point is. :? Do you mean you want it to be somethng printed across our foreheads from the moment we are born that there is only one God and we have to worship him and believe in the Day of Judgement etc?
Lastly, Gos knows best why He choose this method, He is the All-Wise and All-Knowing.
Any man/women with free will that has proof that G-d exists will follow G-d since he is all powerful. It is following by faith not proof which is the test and the reason.
I must differ on this point. I am not sure how the story goes in your religion, but Pharoah was given sign and sign from Prophet Moses that he was the Messenger of God, and he still didnt believe only because of his love of power and his arrogant insistence that he is God.
The same thing happened with Prophet Muhammad pbuh. Many people knew he was telling the truth, but they let worldy thing stop them from believing. For example, one arrogant man refused to believe only because prophet Muhammad pbuh was not from the same tribe as himself.