Ok, so he will upend a system that he has known for like 10 days while subduing almost everyone in the system. Because he's a dominant guy that wants to be evil? How will he even manage to do that? At least in the revolt path, he has support from the DeKocks, Astrid, Yvette and Kiyomi. The very support he will likely lose if he too turned out to be evil and psychotic like Alexander
The scenario you mentioned as the Good dom path - you ally with the chosen Karlssons and then punish the others or try to redeem them, is still logical.
The demon path for evil Kane was that he will join forces with the likes of Juliette, Phoebe, Celeste etc and partake in their more severe activities.Which was cut for one reason or the other. Not for a solo Kane to turn every Karlsson girl and their lackeys into whipping posts or human furniture.
The sub to dom route is a valid point but that route has had irregularities from the start. I'd rather say that the cancelled burn everything ending in Kiyomi's path is simpler to write into the story. After all, it's far easier to burn an empire down than govern it
See whether Kane achieves the true evil dom ending or not and how many people will support him in this single controlled Evil Dom is for future to decide, but the game gives a valid reason for Kane to atleast try for revenge is all i'm saying. Demon Path is may be working with juliette but how far it goes or how many choices will we have to turn the situation in later episodes.. is we know nothing about. Anything is possible. One thing is clear that, Kane is not at all happy with the rob guy and the invisible persons who trapped him. And he exactly knews somehow karlssons are involved in this.
And regarding Kane becoming next alexander, again I dont know how far it will success, but game gives you a hint already that it is a possible path (not now because it is doomed already) is through by katsumi. She expects you to become next alexander, fuck everything and rise above everyone else. What does it mean? Is it not evil dom? The thing you explain for demon path working with juli, celeste etc is not evil dom. I agree. Atleast at the present stage. It is more of Evil Partner/Harem Route (though it is doomed anyway).
And what you think Nadia and Cynthia will prefer? These are also Decocks. They will support you more if you prefer ruling over karlssons but not working with them alongside. And they clearly are more into evil side than Dom Side. Through Cynthia, Nadia and might be (or not be) Delilah too, You will get more than enough support from Decocks. And your pod girl Angelica, Katsumi will help you all along. Dominique is a big submissive girl and also Olivia can be a sub and is flexible in all factions. So, yeah enough support for kane becoming next alexander even without demon path.
You know the plot point of cancelled demon ending that is Red Domination? Tess said this as one possibility but not only the one. Angelica is your second in command (who is your pod girl, ranks at present very low even to you and not at all belong to karlssons) and she, along with you ruling over karlsson and keeping them as human furniture.
So, yeah, some of my reasons may be not as much as convincing to you. But you have to agree that game is giving you more than enough reason to atleast think of mere possibility of revenge in evil dom path irrespective of how much it will be successful in execution. Regarding sub to dom path. Yeah, it have irregularities but you cant players for playing that path and expecting things. You have to blame tess on why she still allowing these irregularity paths and giving chance to players to expect something which is already doomed anyway.