I didn't mean love or power as in variables. I meant it in a sort of boolean you've either killed everyone or none of your friends. Sure, the morality system might matter for the story but I think the ending will be either you're a beast bc you killed everyone or you have lots of allies cuz you didn't kill them regardless of your morality.
Let's put it that way:
MC, no matter what, will have to interact with his friends in very "set" ways, driven by the main plot. The player gets the option to either assist his friends or ignore them, but when they get a role in the main plot, the important actions are already decided by MC's "base personality". There is a path where you (the player) don't give a shit about Liz or Amber, but there is no path where the MC won't rush to their protection once Dad makes that phonecall.
Additionally there is no path where MC is powercrazy like the Sith Lords in Starwars, who kill their own family to "purge" the weakness and be more in tune with the dark side. The low morality path is that MC doesn't give a fuck about random people and is selfish, but he still retains his relationships and he definitely gives a shit about his friends. We don't get the chance to be hostile to people that MC considers "close".
Finally the property of "friend" seems to apply to a select subset of the cast. You can be friendly with Demi and Jake for example, but the choice to kill them is independed of whatever relationship you manage to build with them.
It's extremely contrived for MC to have to kill his friends to achieve ultimate power, unless of course the endgame is to consume the cosmos, or make some similar choice that everyone opposes it no matter the friendship, because it's insane. Even for a selfish MC, the Eye recommends to consume 4 specific people, where only 2 of them can be called "friendly".
My point is this:
Considering the narrative, the difficulties of branching paths and the linear nature of the game, the more likely scenario is that the morality score will be sufficiently low to unlock an ending where you get to kill your friends and become an eldritch horror. I highly doubt that it will work the opposite way.