here’s a very simple workout exercise i tend to use for strength and control for your left foot.
set your metronome (always use a metronome) to 16ths.
play quarter notes for 8 or 16 bars
switch to 8ths
switch to 16ths
then back down to 8ths
back to quarters
play two and four on your snare and play 8ths on your ride.
move back and forth through those at a tempo you feel most comfortable with.
pay very close attention to the separation between the bass drum strikes and keep them even.
this becomes really critical at blast beat tempos.
another simple exercise that will quickly help you with left foot control is playing triplets on the bass drum and quarter notes on your hats.
this naturally forces you to play with an alternating leading foot.
right foot lead and then left foot lead due to the nature of triplets.
pedal setup is also very important with double pedals.
so spend the time tweeking them.

let me know if you have any more questions and i will be glad to help ya!
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@abalone
heh!
neat.
but my pedals don’t even have springs to begin with. 
https://www.instagram.com/p/CJpZbrypVei/?utm_source=ig_web_copy_link