LFO retriggering on note on is considered a useful extra on most analog synths (if at all available). I mostly use the LFO for PWM or vibrato so for me it's far from useless. I can see instances where key retriggering could be useful to be but I haven't had the need yet.
However, you can set the LFO to retrigger on note on using Microbrute Connection, so you're covered.
