I noticed that SPI is still a work in progress and that there is a lib for Adafruit_ILI9340 LCD that uses SPI, but if there is some example or notes on the SPI API available and what is missing I could try to help on that, both in the SPI missing functionality as in the libraries that use SPI, just need some help on where to start and where to look for information.
Best regards, and keep with this good work!
Fernando