I would prefer him having to work on restitution with a payback plan.
I reiterate:
To add insult to injury, Mr Montroll has made no effort to make restitution to his victims. He has continued to act in an opaque and cavalier manner, being non-responsive to any inquiries from the wronged parties. He has refused even to acknowledge the amounts stolen from the victims. This displays a contempt of those upon whom he preyed.
He definitely made a lot of wrong decisions. Biggest one in my eyes was handling the incident the way he did. Which included the silence. Biggest one for him would be the formal stupid moves that mean 30 years in jail. Would he have come clear, probably nothing would have happened at all besides running an unregistered exchanges or somewhat.
Regardless of that, the letter makes not much sense in a constructive way. To your knowledge he didn't try to handle things, ok, but you saying he shouldn't be able to try something now, for just some days, does sound like revenge only.
If he's gone everything will be gone ultimately, most probably. While even this Shavers only received less than 2 years. Somewhat crazy.
But I can understand your feelings, however, I learned emotions are never a good indicator for actions in crypto.
Montroll did not 'make wrong decisions'. He defrauded those who put trust in him. Then stonewalled any and all inquiry in an attempt to cover his tracks.
Even if he were to remain a free man -- even if he were to accept responsibility for his actions (he won't) and direct all his labors (really?) until death toward restitution (as if) -- you'll never get more than a penny on the dollar from him. He is utterly incapable of such. Your willingness to turn the other (ass) cheek (as he bends you over one more time) is a fool's forebearance.
At some point you need to accept that you've been royally screwed, have no hope of recouping your losses even with the hand of the state enforcing it, and move on to making him pay for his misdeeds. If not as punishment, at least as a signal to others who might be contemplating a similar life of crime.
edit:
As stated above: Mr Montroll should be sentenced in line with any other common grifter who preys upon innocent bystanders. Period.
Yes, Shavers got off lightly. I see no benefit in perpetuating such a miscarriage of justice.
Incidentally, I'm pretty emotion-free in this statement. I wrote that loss off a long time ago; it no longer stings. Doesn't mean I don't desire justice.
Well, thinking over the points that he still collected ukyo loan and allowed deposits to weexchange, even though he know the payouts won't be possible anymore, it's fraud, yes. Didn't really thought about that part yet. However, he tried to recoup the funds (in a way that now proved to be the wrong way) and he had other projects he worked on that might have helped pay funds back.
In any case, look who opened the "find trendon shavers in person" thread, who was taking part in the group finding the scammers behind labcoin and others. It's because people did not just give up that led to find scammers. Unfortunately often enough without a chance. Jon was not anonymous from the start like scammers normally do.
You might be right with him maybe not getting the big hit to pay back everything, still, he could try. And 30 years, that's like he murdered someone. Just crazy.
Also, you wouldn't put in the work to write a letter for having him in jail some days earlier, if you really wouldn't be involved emotionally anymore. If you would, you would just not care. Things like that are constantly hurting, probably we have to live with all of our "crypto errors" till the end.
Actually it's not that I don't hate scammers. Those labcoin scammers are trash. They are a disgrace to their mother and did it from a comfortable position. They never needed the money. And surely they have nothing left. That's the kind of scammers I fell for as well. My own stupid decision, however, that surely doesn't help me, just the opposite.
I like to think that scams of that kind weren't so well known then, but it probably was more my own unexperience. Still, if there is a shred of a chance, I won't give up. 
