MAGs don't lose synchro when joining new team.
MAGs lose 5% synchro when you die, even if revived.
Invincibility has been nerfed to last a shorter time?

Holding up or down on the c-stick while traveling through a pipe changes the speed you travel.
Holding left or right on the control stick moves the pipe, too.
Pressing A will change the colors of the swirls when loading a quest.

Shifta and deband won't over-ride current shifta/deband if it's a lower level.

X+A and X+B in the lobby will make you sit in a chair in one of two positions. Pressing A will scoot your chair forward.

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I'm sure there are more things, share share =>_>=;;;;