If you're that worried about a rating 3 Adrenaline pump coming up a "6", you can change that via an Edge expenditure.
To what, reroll a die that then also could come up a 6 again? Can I buy it down somehow as a guarantee? Maybe I am missing your intended option here.
This also assumes I have any Edge left after I go down. If I had just burned it to do a whammy before passing out, I'm in the same boat.
Again, "maybe" is not an acceptable mechanic here either. Its trapware as written. Bin it or fix it. No one will be using it as written who thinks about it for more than a few minutes.
Given the alternatives, would you ever build around it?
Character is under stress (combat), blows the roll to not trigger it, goes HAM for a few rounds, botches the damage roll and has their eyeballs explode. If they die, roll up a new character. If not, the whole team pays days worth of downtime tax for healing up from these failed rolls.
Serious? This is supposed to be a viable choice for folks Because Edge Exists?
Suffice to say, I disagree.