The stalling comes from the removal of that rotating mass. It is just on takeoff and the driver can quickly adjust their driving style to prevent stalling. The gear rattle is because most lightened flywheels are single mass not dual mass. A dual mass flywheel dampens vibration transmitted through the drivetrain, A single mass allows the vibration to be transfered through the clutch and into the gearbox. For about the first 85 years of automobiles all flywheels where single mass, so it is not that big of deal. It will be a little noisier is all. I do not know if a chip will effect the rattle at all.
"It's not because I'm an aggressive driver, it's because I'm an idiot" actual quote from my wife.