I got my mini with retina as the first iPad in the house for myself. I read the threads about the washed out colour etc (which technical analysis shows IS a real problem, i'm not saying anyone's imagined it) but to be honest, I would have never noticed if I hadn't seen the threads here. Now that I have the device, i still can't tell much of a difference.
I got my mother an Air but haven't used them side by side.
I only use safari, check e-mails and play some games, FaceTime here and there and so far it seems perfectly up to the task. It's a nice well built machine, you did pay a premium for it, enjoy the apps and have some fun with it.
If you feel like it's not worth it, speak with your cash and return it. If enough people feel this way and it affects their bottom line, apple will not sacrifice the gamut in the future.
Edit: Just want to say, if you're a designer, photographer etc, I can appreciate why the screen issues would affect you, I know you guys have legit complaints. It's just that the issue won't affect most people.