Honestly, I'm not to scared about the killcount (most of the characters you can kill are assholes anyway. If it wasn't for my No Corruption plan, I'd have killed that pile of diarhea Long). What is giving me more issues is stuff like having to do the NTR Liz route. First off, I now know Long's plan and the mere idea of that kind of torture makes me irrationaly angry, and to top it off I'm not at all fan of NTR in the first place...
The thing is, the tentacle scene was kinda less impactfull because of all that happens before and after. Didn't leave much of an impression. And as for the hospital scene, there was a lot of her usual mystic going on so it didn't really get as much weight, I'd say.
For some reason, the training scene seemed either way more genuine, or had way more impact, probably because there wasn't anything else but them both talking, I guess ?
I didn't think about the self-insert, but I thought it was more a case of comic relief. The character that isn't to be taken seriously, has no bearing on the story, and is just there to serve a side purpose and make you smile. But it's now revealed that it's not the case.
And even aside from having monster parts (after all, other character have gotten their hands on stuff like that, Tiffany for example), there's the package. I don't know if you've tried to open it, but being able to set up a death trap for anyone but the intended recipient is pretty impressive stuff...