Make RP Changelings Scary Monsters and Not Poison Mixers

[Guv Guvington]

imagine watching The Thing and its just a guy who makes everyone fall asleep for 90 minutes straight.

At the risk of being off-topically pendantic, that's kind of how the Thing operated in the movie. It never becomes an abomination unless cornered, and all the stealth kills might as well have been done through sleepy-stings.

Ingame though stealth kills could do with being a bit more visually interesting, all the victim gets other than being knocked out is a little line of text about a probiscus. It would be cool being grabbed by the abomination arm as part of a regular stealth kill, but I assume it costs as much as it does for a reason.

I agree with the last bit.
Imagine while doing the DNA succ, the ling's head becomes this large tryptophobic mutated flesh face that slowly envelops its victim to suck its juices, and turns back normal once the deed is done.
Im specifically thinking of the body horror in Fear and Hunger, LISA or even analog horror.
I feel like there are so many missed opertunities when it comes to body horror and beeing fucked up and terrifying, besides the obligatory escape shuttle shambler.
This is why I wish there was something like a weak shambler state rather than the sting; imagine your in maints and this guy walks up to you and instead of you falling asleep, he turns into this horrific flesh thing and assaults you.