If anyone is interested, I just did a comparison running MF 3.X on the iPad 2 and Air 2 to look for any differences in the channel dB marking legibility. Exactly the same. Hard to read.
The overall GUI looks better and colour is more defined on the Air 2.
I then ran MF Classic for fun and what a difference in the dB scaling, sooo much easier to see with my old eyes. It's not a big deal since I rarely use the scaling for reference except for the 0 dB mark on Main L&R. Beside that I can always type it in the information box/window at the top center of the main screen that shows the selected channel if I want to be very accurate.
And no I wouldn't go back to MF Classic unless I absolutely have to, even though it's still a good version. I like all the pluses that 3.X has to offer even on the 1608.