Retaining the previous zoom level for the various screen modes would be  even bigger help now that we have a weather mode with live ADSB  capability.  I find that a a lot of zooming is required when toggeling  between the sectional and weather screens.  
The live weather is wonderful, even with no radar returns on clear days, the Metar's, winds aloft, Pireps, and Taf's are very nice to have on a cross country flight, and so easy to access by just touching the weather screen!
Thanks for all these features,
Dave