Hrm here's another question for you guys:
Would you like it if Toriyama explored other "in-between" eras like the timeskip between Android arc and Boo arc, or the timeskip between Piccolo arc and Saiyan arc, etc. similar to how Super covers the timeskip between Boo arc and End of Z?
The problem is not much could have really happened for Goku, Gohan, and Piccolo to not be significantly stronger in the android arc, same for between Piccolo and saiyan.. Well I guess Piccolo was significantly stronger in both, but I just don't know what type of threat there'd be that'd be interesting.
I think between android and Buu would be the best. We don't know how Goku got SSJ2 or SSJ3. We don't know how Vegeta got SSJ2, or what made him go back to fighting again. Gohan might be the only mundane one, unless you do it early in his years, a year or two post Cell arc.
Though in all honesty, I'd rather they explore another universe over something we can kind of picture how the events transpired, or could be mentioned in a few scenes in Super is one of the characters gets in a nostalgic mood.