GPS faster location update using interpolation
Looking at the GPS screen, it looks like GPS update frequency is every 1 second. Also on map (primary) screen, it looks like location is updated every 1 second.
Map redraw is obviously very fast, as when you pan around vector maps the panning is very quick and pretty seamless, so map engine is not a concern for quick redraws.
I would like to suggest faster location update using interpolation, so that location is updated maybe every ~250ms (4x as fast as current) using a combination of GPS location, heading and speed and interpolating the data between updates. Most other mapping/navigation apps already do this (Google Maps the prime example), they display current location very smoothly and quickly, I assume by interpolating GPS location updates.
I use Locus Maps for navigation on my motorcycle, and sometimes 1 second updates make planning upcoming turns a little tricky if there are numerous roads to turn down and you are looking for one specific road. I think having faster location updates using interpolation would make navigation much easier to anticipate.