(Because I know half of you don’t read any of the other forums but this one 
)
We’ve started the ball rolling on killing off the Legacy Particle System (i.e. the one that was around before Unity 3.5, and lingers in a ‘Legacy’ submenu to this very day).
This process is going to take a little while, and we want to make sure that we leave behind as few people as possible. So this is the “speak now or forever hold your peace” bit - if you’re still using Legacy and need us to fix/improve/add something in the newer particle system (Shuriken) before you can upgrade, please let us know in the official thread.