We should fight the illusion that a TDT agent retrocausally controls Omega's choice. It doesn't. Omega's choice was controlled by the extrapolated dispositions of the TDT agent, as they were in the past. We don't need to replace CDT with TDT as our default decision theory, we just need to understand the exceptional situations in which it is expedient to replace CDT with something else. TDT will apply to some of those situations, but not all of them.

I don't endorse the decision theory you describe but do point out that this isn't CDT. You are actually talking about a new, largely undefined decision theory which consists of using CDT sometimes and something else at other times. That is, you have replaced CDT. If it were the case that TDT (or the derivatives like UDT) were flawed and needed to be replaced in this manner then the correct way to theorize about the subject is to pick apart just what decision algorithm you would pick for which exceptional situation and then describe this overall process - perhaps calling it 'Mitchell Porter Ad-hoc Decision Theory.'