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.