I am about to buy a boxed, new MP2 that was originally purchased quite a while ago (Cheaper than Black Friday sale price).... have there been any significant changes to the MP2 since it was released?.... like props, ESC's, motors.... anything?
Only hardware change is remote version RC1B which is not compatible with Morvario BT-300. Nobody knows what other difference is between the two versions.
For FW differences, I suggest going through the release notes.
To the best of my knowledge most everything is either the same or can be upgraded with Firmware upgrades such as the lack of precision landing on the first released!. When the M2P was first released it wasn't included until later Firmware upgrades. I'd be hesitant in upgrading to the very latest Firmware until you research the good and bad of the latest Firmware. Good luck!