I personally can't fathom Dez truly getting no punishment for his evil shit eventually just solely by circumstance unless Vesper becomes a total pussy. The reason murderhobos get owned is because their over aggression tends to provoke fights they can't win and that almost happened twice with the wyrmling and the goblin horde. Wyrmling is saved by Erky and the goblin was just horrible luck, a misread on a feature, and some marginally bad tactics that so happened to favor the party. I think Vesper was trying to give CurioBOT a very genuine chance at character development to try and convince Magni IC and OOC to change and well...its CurioBOT I guess.
I think where I disagree with Vesper's DMing is I think the rests are kind of horseshit, no fucking way you're long resting in there as their should be SOMETHING wondering about the fire from earlier to disrupt you, and the short rest next to the burning room with 8 goblins being next to it is not happening. Both of those are kind of bullshit and too game-y for my tastes. Also I think he's being inconsistent on how attack roll vs AC ties work as sometimes he made them hit and sometimes he didn't iirc, and the official rule is ties go to the defender which is could saved a one of his goblins at the end who was running when only Catxel was up.
Dez to me doesn't strike me as someone who's getting away with everything because Vesper is holding back, besides the rests and Erky being too nice, I think Magni has just been getting lucky enough to scrape by in these fights especially when Magni is literally just pew pewing Warlock and not at all abusing the depth of having a spell list. Maybe I'm coping, but I can't fathom this trend continuing too long where Dez can just keep getting revived and carried out. The boys aren't exactly abusing yo-yo healing tactics to compensate how many close fights they take and very likely the giant hulking death golem who keeps fucking with people will get a reputation (imo if I were DMing this stuff) overall and not be very welcomed. Or Dez will fail a deception roll or something on any important thing and get owned that way when he tells a too elaborate lie. Hell if Erky really gets fucked up and doesn't just die, I expect him to basically slander CurioBOT's name and that to get around as this is Vesper's setting after this dungeon. So depending on how relevant Erky's church is, then their is ways to make CurioBOT's actions hinder him within the world going forward.
I'm going to very likely keep watching regardless, because frankly seeing CurioBOT eventually suffer will be great and the dice will make him suffer eventually just by statistics, and Vesper can't keep shoving random Cleric NPCs to bail them out with emergency healing especially if Altor doesn't take healing magic himself like he hasn't so far. I'm sure someone will hint or even straight up clip when CurioBOT dies or gets own for his evil deeds eventually within the Tempus sphere, so even if you bail you'll probably see a clip or something of CurioBOT's evil finally catching up with him.