Those who have downloaded for the older models? have yet to do mine...any issues so far?
Just the standard issues that makes iOS7 unfinished for iPads in general. Other than that it's fine.
I've said it before: I believe the main reason the blur effects are disabled on the iPad 2 is the fact that, apparently, the iPad 3 can't cope with them, and it would be very hard to explain why the newer iPad 3 would have effects disabled that work on the older iPad 2. Since the iPad mini is newer than the iPad 3, there's no problem there.
(I read that iPad 2 actually capable, those effects were disabled because iPad 3 couldn't handle them, iPad 3 owner would whine if iPad 3 looks worse than iPad 2)