I sympathize with your exasperation re: trainer wing incidence. These offbeat features I'm sure are incorporated with the aim of making the design more foolproof in the hands of a beginner. I forget what all the changes are that I put in my Senior Telemaster, but my recollection is that the wing incidence, the downthrust, the tail decalage were all too much for my taste, even as a fledgling RC flyer (although I had built and flown many freeflight and U/C models in my younger days).

It's experiences like this that will make you a more thoughtful, more discerning RC aviator. Be assured that the tried and true "second plane" models are much less convoluted in their designs.