It’s not surprising that Boeing will stick with the 767 for the rebid of the tanker program. They have only a few months to respond, and going with, for example, a shortened 777 would be a very difficult thing.
The problem is that the A330 is a better plain, and the A330 MRTT, which is the airframe that Airbus is using, is flying now, even while Boeing is struggling to deliver its 767 tanker to Italy, which is not the same airframe as is proposed for the US tanker.
Airbus is clearly the better choice, even the GAO review said that while faulting the selection process, but politics being what it is, I would give Airbus a no better than 50/50 chance of winning this if it ends up a soul source bid.