Decision theories should usually be seen as normative, not descriptive. How "realistic" something is, is not very important, especially for thought experiments. Decision theory cashes out where you find a situation that can indeed be analyzed with it, and where you'll secure a better outcome by following theory's advice. For example, noticing acausal control has advantages in many real-world situations (Parfit's Hitchhiker variants). Eliezer's TDT paper discusses this towards the end of Part I.
I believe you misinterpreted my "unrealistic requirements". A better choice of words would have been "unachievably stringent requirements". I wasn't complaining that Omega and the like are unrealistic. At least not here.
The version I have of Eliezer's TDT paper doesn't have a "Part I". It is dated "September 2010 and has 112 pages. Is there a better version available?
I don't understand your other comments. Or, perhaps more accurately, I don't understand what they were in response to.
A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).