These sound like basically reasonable worries / lines of argument to me. I'm sure life will be a lot easier for... not necessarily everyone, but at least us primitive mortal analysts... if it's easy for superintelligences to exhibit their source code to each other. Then we just have the problem of logical ordering in threats and games of Chicken. (Come to think of it, blackmail threats of mutual destruction unless paid off, would seem to become more probable, not less, as you became more able to exhibit and prove your source code to the other player.)

A possible primary remaining source of our differing guesses at this point, may have to do with the degree to which we think that decision processes are a priori (un)correlated. I take statements like "Obviously, everyone plays D at the end" to be evidence of very high a priori correlation - it's no good talking about different heuristics, intuitions, priors, utility functions, etcetera, if you don't actually conclude that maybe some players play C and others play D.

It's also difficult if two sides have different preferences about the correlation of their moves, that is, if one side wants them to be positively correlated, and another wants them to be uncorrelated or negatively correlated.

How would that happen?