So with an upgrade to the Air 2 likely to happen, I thought it would be best to give iOS 9 a fair shot before spending the money on a new one and then run it on that for a week or so. So to help other people in their decision here are my thoughts after about 5 days.
1. The update gives you a new iPad feel when using it and looking at it, but there are still issues with it. Additional features going from iOS 6 are pretty nice and the look isn't bad either.
2. The biggest lag is in the keyboard and in typing or selecting the place to type. This is what bothers me the most, as Office/iWork would be useless with a keyboard that lags.
3. Safari hasn't crashed yet, even on sites with a bunch of pictures and sites that used to make it crash before, mostly jalopnik, yahoo, and motor trend. Safari crashing was the one thing that bothered me the most under 6.
4. Battery life is terrible. It used to seem to trickle down, now it seems more like the iPhone 5s where it just drains at a quicker rate than before.
5. The new music app is terrible, but this is an all around deal. I have a bunch of music purchased, but they make it more hidden to access and the emphasis is on their subscription service. Now I get that they need to promote their own thing, but it shouldn't overtake the whole music app.
For those interested, I upgraded through my MacBook but did not set up as a new iPad. If things get crappier or if something necessitates a restore, I will try as new just because. I still plan on upgrading to the Air 2, mostly for it being light, the speed of it, battery life, and 64 GB compared to 32. Hopefully this helps someone else in my position or something similar, and feel free to ask any questions about it.