I think people have deconstructed Angus enough now. Dude is clearly going to be leaving the comic soon, so it's not like we need to hash out much more. Speculating about the inevitable Sven interaction is better.
Naturally, Sven will re-enter the picture during her coping, but in what capacity? There was at least one instance (strip #872, idk how to do the fancy weird links you people do. I'm technologically handicapped) where Sven seemed to show concern for Faye getting too drunk, and he doesn't strike me as the type to take advantage of someone who's been drinking. YES he's self-centred, YES he's egotistical, YES he had a spoiled childhood, but he has shown GENUINE remorse for how things went between him and Faye. I can't make myself believe that, if he came across a newly-single and drunk Faye alone in a bar, even IF she made a pass at him, that he would take advantage of her while she's drunk. He has been shown to give genuinely good advice in the past, to Dora, Faye, Marten, and Wil. Perhaps he'd take up that role again.
He's not a great guy. But he's trying to get better, even if he's not sure how to do that.
In the comic arc you cited,
Sven did actually make a pass at Faye a few strips later. It's pretty clear that despite being drunk her judgement was not challenged in any way though, so short of actual rape (which he'd of course never do) it's not like anything could have been in the cards. Also remember that if Sven really does have feelings for Faye, he could be desperate for any sign of affection from her, no matter how wrong it seems in the moment. I mean, I may be Sven's polar opposite in terms of personality, but back in the day, when I was crazy about a woman who didn't have romantic feelings for me, I would have taken what I could get, even if it was just pity sex, in the vain hope that it might somehow flower into something more real.
That said, there's a ton of ways this could work out. I think the healthiest (if Sven actually wants to court Faye again) would be if he tries to comfort her emotionally without screwing her. Say, for example, if she's drunk and lonely, and he lets her share a bed, but keeps things PG. This would take major character growth on Sven's part though - I don't know if he'd be up to it. But if he wants a shot with her I think that's what he has to do now.
This is just a vague fear at this point but I wouldn't leave Faye on her own around booze or blades if Angus breaks up with her. I worry that she may decide that she wants to see her father.
You're both severely overestimating Faye's mental instability, and her attachment to Angus. I mean, I think she likes Angus, but no more than Marten liked Dora, and they've been going out for less time than Marten and Dora did. It's pretty clear she's the one willing to walk away from the relationship at this point, and the dumper is almost always in better emotional shape after a relationship ends than the dumpee.
I just thought of this... but in that whole list of things that Angus has "taken care of " Faye was dead last to be mentioned...
That's cause Faye brought it up last, as she was trying to not seem clingy/self important. She was downplaying her own insecurities to the last.
I also don't think that it would be a realistic narrative, the svenectomy looks irreversible to me... UNLESS Faye decides out of pure spite or in an uncontrollable fit of rage to turn EVERYBODY against her. Remember, Dora svenectomized because she heard that he confessed his love for Faye completely out of context and situation. Now, this would bring Faye into a situation I would't want to happen. It would alienate and isolate a main character
Faye never said she'd never talk to Sven again, Dora did.