Well,the F-15K doesn’t have the kind of modifications you talk about.Sure a souped up F-15 makes a lot of sense,but would the USAF buy into it???I am pretty sure that such possibilities would have been discussed long ago.Would it buy something which costs 80 million+ a piece & is still something which exists on paper,while it is trying to get more Raptors??
The "K" does have many of the avionics upgrades I'm talking about, but no it is not close to the total package I discussed. Would the USAF suggest such a thing? No. But after they have the Raptor, more aren't forthcoming, and the F-15 airframes hit a wall, they might consider it.
In any event my point wasn't what I thought would happen, just what I thought was feasible. The Russians have certainly upgraded the basic Flanker into another level of capability.