Alex, I think you have hit the nail on the head with the real beauty that the original 1608 had.. minimun features, but enough to provide great sound and control without the need for features found on very expensive sound consoles.
I really suggest that you contact Mackie and ask them if there is a
safe way to continue to use the 1608 as it is now and never have to update to 3.0.
I completely understand your use of it and the volunteer people who are already somewhat intimidated with version 2 app.
The added features of 3.0 are absolutely wonderful, but they are only useful if the user understands them completely, otherwise, there is a myriad of ways to accidentally cause something to not work with a single un-intended swipe or touch, and way too much time needed to figure it out if that could even happen with the given operator at hand.
With V3.0 we have features found on very expensive digital consoles, but the biggest single feature and beauty of the 1608 was it's very simple user friendly interface, that is completely gone with V3.0. It sounds like I don't like V3.0 but I do,..... I am a seasoned 58 year young engineer that has spent his life running sound for concerts, corporate shows, conventions, church musical productions and way too many studio recording sessions, but I for one am elated with V.30 but do feel saddened for folks who just want to keep it simple and not
EVER be forced to update the app.
My fear for you is that you will willingly update the IOS on your iPad one day and Apple will have re-invented the wheel as they always feel like they have to, and making "AUTO APP UPDATE" the default As soon as your iPad gets into the vicinity of a wireless internet connection, it would automatically "GET" the new App and install it... then Sunday morning rolls round and the 1608 gets turned on with the rest of the sound system and the I-Pad warns you that the DL1608 must update it's "FIRMWARE" and you have no choice but to wait in horror.
Hmmmm, call Mackie!!!!
Ask them.
Dan