limiting us to 2 engines and 10 skill cap.
I don't see the problem here.
Wasn't there a quote from Inadequate that would work here? I don't remember the exact words, but it was basically "people use realism as a means of justifying features they want added, but immediately throw that concept out the window when it is used to add features they don't like/change pre-existing features."
I am paraphrasing a lot, and that probably- no, it definitely isn't even close to the exact wording, but it makes the same point.