User blog comment:Prolietor Dominus/Skyrim info from PC Gamer/@comment-2053932-20111004141201/@comment-4113369-20111005214347

Elsweyr and Black Marsh have already left the Empire, and most of Morrowind lies in ruins. Losing Skyrim as well could be the final nail in the coffin, pushing Tamriel out into full chaos/war. Weakening the Empire further doesn't seem like a good long-term plan. (That's just Wild Mass Guessing on my part, though)