There are more than one fingering system for the oboe in common use, with the conservatory and simple systems being the most common (I think). In the US, most of the oboes seem to have some form of conservatory system. I've seen examples of of the "sax-based" fingering system but never played on one. I don't think it is a question of "cheating", but that designs with sax-like fingerings didn't sound like the more traditional systems. I bet if someone were to devise a more convenient fingering system on an instrument that sounds like we expect an oboe to sound, the traditional systems would go the way of the dodo.