KP,
I have to admit I am at a disadvantage when it comes to your religion because my knowledge of it is incomplete which is why I try to avoid specifics when discussing religion.
I think we seem to basically agree except on two fundamental points, obviously faith, perhaps your right but I need a more evidence to believe in something. That's just the way it is.
Regarding the Original Quran being present to date, yes the language may be contemporary but it was written 1400 years ago so to me it can't tell you in detail how to live in the 21st century only in general terms. Regarding interpretation even in Islam there are two distinct branches interpreting the same book and religion differently so how can the message be clear.