urrf particle effect undo

why is it that undo feels broken when using the particle effect editor.

example just make some changes to any parameter, then ctrl z... .. oh it just stopped the simulation...

..yet I can manually adjust the value back to what it was just before without it breaking the simulation.

and the particle effect editor.. really should have a quicker way to disable renderer (ie usually involves scrolling all the way to the bottom or collapsing the particle effect to quickly hit the tick box).. why can't disable render be an option at the top near the particle name.. and same with creating a new particle system.. there is a '+' icon to the right of the particle effect editor.. yet the only way to delete it is to use the scene hierarchy.. ..the [rmb] context menu for each particle system has only a pathetic few options ie (show location,create particle system, reset) one of them should really be delete!