I also think this would be a good idea to try, perhaps coupled with my other (earlier) suggestion to "pin" the map with Departure airport centered until first zoom change or until Center button pressed. (Which is almost the same as "iFly, don't auto-Center when coming out of Airport Diagram.")
In my flying, I've started setting one iFly tablet to Vector mode before departure and zoomed in fairly tight around the airport so that I can see traffic easier. (Our airport has two flight schools now, training scads of Chinese & Koreans, and is becoming one of the busiest GA aircraft in the country.) The other tablet is in VFR mode for nav purposes.
I don't often set the first tablet as tight on zoom when returning back to our field. So for me, a "Departure preset zoom" would be more consistent than returning to previous zoom. (For example, at night, I often put the tablet to sleep on final to minimize glare in the cockpit.)
The reason for not Centering the map when coming out of Diagram mode is two fold: 1) It's distracting/vertigo inducing (esp. at night) when the map is constantly shifting as you do a crosswind/downwind departure and 2) similarly, it's difficult to reacquire Traffic when the map is constantly shifting as you turn 90 then 180 degrees on departure. (And this North Up. It would be worse with Track Up on Departure.)
Not auto-Centering the map would be even more important if a preset tight zoom was auto-enabled, since the shifting during Departure would be larger.