My issues are these ...
1 - safari tabs reload way too much. I have stopped researching when typing forum responses, because what I type will disappear due to a reload. This is with Safari being the only app open, and only 2 tabs.
2 - apple went from 32 -> 64 bit CPU, and did not increase the ram on the iPad. iPhone I can possibly understand, because you are not pushing as many pixels. But for the air?!?!? You have less effective ram on the air, than the iPad 3&4.
3 - Apple, knowing the iOS roadmap, purposely chose to NOT increase ram to encourage people to upgrade their air to take advantage of the multitasking that will be in ios8. With 1 gig of ram and 1/2 devoted to iOS, that means two apps will have to live in 256megs of ram when multitasking. Make that 2 gigs of ram(enough to handle safari on the air now - BTW), and now you have 759megs of ram for each of two multitasking apps. 256 versus 750 - that is HUGE. Ask the iPad 1 folks if their experiences would be any better with 750megs of ram versus the pathetic 256 that they got. It's called planned obsolescence.
I am using my air every day. Other than safari and the lack of future usability in a multitasking iOS future, I think it's pretty good. However I am mad at myself for getti it, knowing that the 1 gig of ram would be an issue with future usability.
My personal situation is that my family inherits the prior gen of hardware. So the reselling routine does not mesh with my usage model. Besides, the resale of the airs is pathetic, due to a glut of produce, existing discounts to mode the glut, and lots of people wanting to sell as well. People are not recouping all of their $$$ anymore on resales.