will it save and export maps? you can make and save as many maps (really not maps, but tunes) as you want - as far as exporting, exporting to what? a different kind of software, what for? the tunes are just files you save on your hd
as in do a tune for wet nasty power IE why most people get one - it won't do any thing on it's own - it comes with a slightly more aggressive then stock tune that levels the boost at 17psi after it's spike - it's only as good as the person using it if you want to go further then that
and do a tune for conservative highway fuel economy - again depends on what you or your tuner knows
and dead stock for the inevitable return to the realm of mazda NA -any time you would disconnect the standback you would be back to dead stock b/c it's a piggyback that works by tricking you sensors to make the ecu do what you want to do - it doesn't flash the chips and changes are only happening if it's connected - but if you want to be able to disconnect and reconnect it easy you have to shell out another $500 for the pnp harness - otherwise it's hardwired to your ecu plugs
and be able to load either one from usb or whatever?