I actually pre-ordered the mini 7 and wound up cancelling it about 20 minutes later after I thought more about it. Obviously I would have loved OLED and ProMotion, but neither one of those things were rumored so I didn't expect that.
I would have been happy with just the spec bump, except for the fact that Apple didn't even put this year's processor in it. I know it's not a huge difference, but it's the principle for me. I'm going to stick with my mini 6 for now, pray this isn't the last mini, and hope we can get an upgrade with OLED sooner than 3 years from now.