John, thanks for raising this issue, and I'm glad we got this temporarily resolved for you.
I have added it to our 10.4 TODO list (next release) to revisit map-panning performance and behavior. In 10.3 we changed some thresholds for doing data updates to new areas shown from map panning more quickly -- but the caveat is that this change appears to have caused choppiness for some users/devices.
For 2 months of beta testing, we didn't have any complaints about performance, and so I'm not sure how prevalent will be the perception that 10.3 map panning performance is *worse* and on what % of devices. The performance tweak we did is impacted by SDCard read speed, CPU speed, and possibly RAM...
In the meantime, pre-10.4 release, you can choose to download the 10.2.77 APK from our website and use it instead, if you prefer. However, when you are using non-latest-production version, in-app purchasing should be non-functional - just FYI, if you are needing to extend your subscription.
Here's where you can get 10.2.77, if you prefer (but you may be required to do a full uninstall of production version, for Android to permit the downgrade).
http://www.iflygps.com/AndroidAPK