For users without the pedal there are sometimes instances where
1.  the car brakes because lead car is slowing, 
2.  the car falls below the minimum cruise threshold and cruise disables
3.  the lead car pulls away
4.  car is now below cruise so can't accelerate, the non-loud alert is displayed and OP is disabled - the user doesn't notice
5.  the lead car brakes
6.  the user is caught flat footed because they weren't aware that step 4 happened because couldn't hear / see the subtle alert that OP was disabled

This is a safety concern as it happened to me a few times before I got my pedal.  Sending the loud alert mitigates this risk.

This reverts commit 654abc4.