I've been suffering from dry, flaky skin since upping the strength of my BP. My usual Shiseido Pureness gel-creme couldn't handle the dry spots, but the Cetaphil lotion works like a charm. The Cetaphil is too much moisture for me to use under normal circumstances, though.
Whenever my skin is really dry, I use pure aloe vera. It works for me...especially if my skin is dried out from the cold or sun. I bought the huge tub of it for like $5 at the drugstore and it lasts forever. So maybe try that out...
Also, exfoiliating regularly might help. I use an old fashioned hydroxy peel, and sometimes a glycolic toner, it might be too strong since my skin isn't super sensitive, but maybe something along those lines.