Every government system needs to have various venues to allow for change according to the preferences of the power holders. If, in the longer term, trust redeveloped between the different communities, they could conceivably make adjustments to the governing model and Iraq could function in the long term. Frankly, the people I speak to here are often pessimistic about this. The Kurds frankly want to secede; they're done. It's just a question of timing that they disagree about amongst themselves. Whatever is put in place perhaps needs to have mechanisms for peaceful change in the future.
On November 15th, 2016. See this statement in context.