There is a link on the website dedicated to suggestions. Suggestions should go through that link as well as being posted on the forums. When an official suggestion is submitted, it is reviewed. When posted on the forums, which are user based, it may get missed.
If you want choices to change the colors due to vision problems, submit that as a suggestion because it will probably help others as well.
The suggestion given to you is to link the fans with the fan link, not only does the fan bind change to blue, it also shows the chain link which can help with identification of there is a blue vision deficiency. Yes, it links the cards together for user control. Hopefully evga can add this to work strictly on gpu temperature, but for now, link the fans and set up a custom fan curve as suggested and see if maybe that will help.
My cards are founders, and the fans were removed in favor of watercooling, so I can only speak through others experiences.
Also, en chroma makes some amazing glasses that can assist with that as well. That isn’t to take a jab at anyone, but if you are going to bring it up, there is help for that medical condition.http://enchroma.com/