There also the stars which also allow magic to enter Mundus.
True, but starlight doesn't burn vampires any more than lying down at the beach regularly on clear nights without sun cream gives one skin cancer. Either less magicka comes from the nightsky or it has different properties to sunlight.
I think your on to something. I wonder if beth would take inspirations from your theory, as well as my theories (shown above) when trying to find some way to conclude the elder scrolls series (if they ever do).
http://www.gamesas.com/topic/1390687-regarding-chim/page__p__21109665__hl__godhead__fromsearch__1#entry21109665. Well, the dream idea anyway. I don't think there's supposed to be any link to our world, but then the TES universe is subject to cyclic time. So one kalpa might resemble our reality, but I don't know how that could work. Some people on the lore forum might like to discuss it. It beats another thread about racial lifespans.