From what I have been reading, you look at particular patterns to achieve what you are doing graphics wise. Have you ever thought about taking it to the next step, and allowing for higher res patterns to be injected, as well as a larger palette selection.
Hi Def 16bit etc graphics
oh I understand it is not a priority, just would be nice to see if it was possible based on what is already been done. I have always wanted to write an NES emulator that took in a higher definition tile set, I just never had time to write it, and from seeing this, immediately thought of it.