I discovered, today, that if you have the gimbal upward tilt limit set to 0˚, after using the Panorama Photosphere mode this limit is temporarily removed and the -30˚ limit is available … even if you switch back to single shot mode.
Checking the setting, it still claimed to be limited to 0˚ … but this only becomes effective again after rebooting the MP.
This was on Android 4.01.22 and Firmware 01.04.0100.
Didn’t try the other Pano modes, today - may or may not apply to some/all of the others.
I’ll check the other Pano modes another day.