==Any changes to theory will still have physics and astronomy being incompatible with the notion that the universe was created 6,000 years ago (or 10,000 or anything less than billions of years).
Not at all. Creation cosmologists have already demonstrated that it is possible for the Earth to be thousands of years old, and the outer reaches of the Universe to be billions of years old, and both be the result of the SAME creation event. See the following for more:
http://creation.com/images/pdfs/cabook/chapter5.pdf
White holes..... Don't bet any real money on that one, that's basically a quasi-Christian vision of the same sort of junk physics which is ruining academia at present. In real life, gravity turns out to be an electrostatic dipole effect of some sort, the universe turns out to be eternal like God, and the creation stories we read in antique literature turn out to be describing the creation of our own living world and local environment, and not the creation of the universe.
The main thing that keeps me from being a YEC is Venus. We DO have the one planet in our system which is actually ballpark for a 6000 - 10,000 year age estimate and we can see what that sort of a planet looks like: 900F surface temperatures, massive thermal imbalance, massive upwards IR flux, statistically random cratering, total lack of any sort of a regolith, 90-bar CO2 atmosphere in which a 3 mph wind would bowl you over, etc, etc, etc.
Earth and Mars do not resemble that in any way, shape, or fashion, and so you have to assume they are older than that.