Just finished updating my older iPad 2 to iOS 8.1.3. The iPad is a shade faster overall. I ran MF 2.X on the update and it worked fine, just as before. I then updated to MF 3.X. It opened as fast as 2.X. The fader lag seems to be a little less than before on iOS 8.1.2. Not as fast as MF 2.X still. But it’s pretty much useable now, for myself.
Vintage EQ, which I use exclusively was just fine, like 2.X. Modern EQ, is still atrocious IMHO. When you open up the different functions at first, there is a slight delay. When you close them and open them again right away, they are fast. Maybe loading up into memory?
For myself, I feel that I could now use MF 3.X under iOS 8.1.3 fairly comfortably in a live situation. Overall the iOS update has made MF 3.X generally a little faster on my older iPad 2. I may try it on my newer iPad 2 to see if there is a difference. Probably not though. I still may wait and hang onto MF 2.X, to see if Mackie makes any improvements to the next update of MF 3.X