I've read most of this thread, but not all of it, so forgive me if it was mentioned already but I fail to see why the creation of the Earth 6000 yrs ago would prevent light from 14 billion years ago from reaching it today.
Indeed, that would neatly solve the "old light" problem. However, it probably raises even more difficulties. In the first place, it destroys the YEC insistence on a single creation event as stated in Gen 1: the Heavens and the Earth were created at the same time. If you're going to give in on the age of the universe, what's the point in insisting on a young Earth? Secondly, this would imply there were constant creation events going on - even today. This is another thing that most YECs won't countenance. Other problems will undoubtedly occur to you if you think about it.