I don't see what's terribly complicated about adding, subtracting, dividing, multiplying, and inverse powers. If somewhere between a 6th and 8th grader is fully capable of running these computations, then I don't view it as complex. Tedious, yes. Which is why there needs to be a spreadsheet chart. All the factors you listed are included in QJM. To build a system around them that is not QJM is to just arbitrarily make up a system that does not reflect reality because you don't like the system that does. If you want to do that, then you can just make up whatever crap you want and say that it reflects reality--it doesn't, because it isn't based on reality. In fact, although I can't find it, I recall you leveling this very argument against one of my proposals some years ago. But as it stands now, I myself am not particularly interested in substituting my own personal bias for something which is simply constantly biased in a particular way.
The process is not difficult. You have a compilation of OLIs, either for weapons systems or theater units. You stack them up, and identify the other factors, such as training and terrain et al. It crunches the numbers and spits out a result at you. There, you're done. You have to click maybe two to three dozen input cells to identify them, the horror. If that's too complex for other people, that's their own problem--it's not too complex for me, or apparently many other people. We are doing this process so we will know how to get from here to there and what we can actually do with the system.
Unfortuantely, 8th graders at a distinguished High School/Junior cannot perform the abovementioned tasks.