Greetings from Sacramento CA and a previous Pfaffanista. I have an older machine which works really well and then I got the Performance 2058 which is very temperamental. She also uses the blue bobbins. My thought on that is: If changing the bobbin could cause something internal to go wrong, I'd use the bobbins recommended for the machine.
As for the low bobbin indicator, mine has gone out before when a piece of lint got in the way of the sensor. The 2058 has an annoying low bobbin indicator that actually beeps, shows on the display AND stops sewing instead of the blinking light. That was one reason why I just changed brands: From Pfaff to Babylock.