Well, you have to understand I'm starting from Augusta's understanding of socionics. She herself wrote something to the effect of, "it's unclear how, given our model, people are able to survive without duals at all." She wrote a monograph on how ILE is the best type for the leader of a research institute. Her descriptions of Ne in particular or not strictly Ne per se, but the Ne of an academically minded person.
In socionics "dualization" is basically a synonym for "falling in love." It can happen with types other than your dual, and you won't fall in love with all duals. Early socionists, and some today still talk of dualization as if it were some special socionics-specific phenomenon, when in fact what they're describing is simply the state of being in love. You might say, "well yes, but with a dual you get what you're expecting, and with other types you don't." But looking at couples who have been married for 20 years or more, I have to say that some non-duals still have a spark of true love.
Of course, these and numerous other minor misconceptions can be corrected, but we're still left with the fact that a person rejects one dual and accepts another, or even prefers someone of another type who is easier to deal with than a dual that for some reason is not. The model of 8 functions interchanging information with the functions of other individuals is not complex enough to explain what actually goes on between people. So many, "ifs, ands, and buts" have to be added. It's also clear that the socionics model is not a model of the psyche, but just a layer of the psyche. I disagree that you can relate any stimulus-response relationship to one of the 8 functions. If you start doing that, things just get too complicated. Why, then, does one IEE have heightened sensitivity to a class of phenomena when another one doesn't?
Real-life observations of types: there's always a "kernel of a type" within a person that becomes obvious over time, but one SLE may be highly rational in thought and another one irrational. If you are obligated to relate everything to a socionics function, it's hard to explain. Leave socionics out of the picture for a moment, and it becomes easy. One is rational because he has well-developed mental abilities and rational thought, and probably a higher IQ. Another one may be less mental, with less academic training, etc. Often explanations for things lie on the surface, not hidden deep within Model A...
Of course, all these points are debatable!