Currently on the mini 2 as well and I'm looking at the Air 3! My mini 2 is nice and all, but I'm sorry, it is a stuttery, hellish mess for being on its first OS update. The 1GB of RAM is also an issue, switching between apps or tabs (if I dare take the risk) is a huge race because if I leave for more than 30 seconds, all my progress on the previous task will be gone.
The display is pretty nice, but the color gamut is a bit of an issue for me. It is tolerable for sure, but it bugs me when I edit a photo on my iPad I crank up the saturation and such, but when I look at the photo on my iPhone, it is WAY overdone. Plus if I find a cool wallpaper I set on my phone, it looks awful on my iPad because it simply is washed out and drab. If I wasn't spoiled with my iPhone 6 being next to my iPad, it wouldn't hardly be an issue
The larger screen size also seems extremely appealing to me lately. Extra screen quality is just the cherry on top.
I miss Touch ID from my iPhone as well, but I'm not getting that scam of an iPad mini 3.
Finally, I fear for the iPad mini's future. So I sort of want to get off of the iPad mini train. I feel like year after year, we will see "iPad mini 3's" as well. I don't want to be screwed over by being attached to the mini.
I almost jumped on the recent staples deal for the iPad Air 2, with the $100 off and all, but I figure it's just way too close to the next iPad. I would regret the purchase in 3-4 months. I also would like to see them fix the vibration "issue" and somehow improve battery life as I hear it is a bit iffy on the Air 2. Probably still more than sufficient but I would rather not have to worry.