Hey there,
Still rocking an appless Pre3 :P
I don't know whether it is my phone or the app, but like the title says: panning and zooming in Maps is very choppy. I have also installed Google Maps, but that works great.
Maybe it is the app, but I think I have seen it being smooth on my phone in the beginning.
Even now with the latest update, it is very laggy and choppy.

Is it just me? I have even doctored my pre3, but can't get it smoothed out.