Thank you guys for the appreciative comments, it's warming to see other Dark Urge players just as passionate about the character and its unique romance with Minthara/Astarion who are supposed to fully accompany the character to the very end.

As an addition to my post above, I've also come up with this visualized 4th endgame choice concept that respects player agency and previously established character motives through incredibly minor additions yet significantly satisfactory results;

CHOSEN DARK URGE & MINTHARA/ASTARION 4th ENDGAME CHOICE;

[Linked Image from i.imgur.com]

(❗HEAVY SPOILER IMAGES❗- VISUALIZED 4th CHOICE CONCEPT!)

The Dark Urge and Minthara finally took control of the Absolute and the final choice presents itself;

  • 1. Kill with one last kiss.
  • 2. You do not want to see what is to come. Death is my reward for your service.
  • 3. Run from me when we land. We will meet again at the end of days, when I shall come for you.
  • 4. Father smiles upon us beloved. Let us usher in this new age together, in Bhaal's name.

[Linked Image from i.imgur.com]

*Minthara approaches her Dark Urge and they share each other in a passionate embrace having fulfilled their destiny, locking themselves in a deep loving kiss as Sceleritas Fel pops into existence behind the couple with the widest grin imaginable. So proud of the Child Of Bhaal finally growing up into full devastating potential*

[Linked Image from i.imgur.com]

*With the two lovers holding each other's hands, the Dark Urge now turns his gaze upon Baldur's Gate and steps off the edge with Minthara in hand. Both levitating together towards the ground where a terrible fate awaits all those unfortunate to survive the chaos so far*

[Linked Image from i.imgur.com]

*He descends with Minthara's hand grasping his, ensuring she gently sets upon the ground, the mother of future Bhaalspawn she is after all. He takes one good look at the terrified population of the city and wills it to end.*

[Linked Image from i.imgur.com]

*SLAUGHTER! CHAOS! OBLIVION ENSUES! Minthara smiles at the carnage in admiration, pulling herself even closer to him, Sceleritas Fel joyfully giggling like a little schoolgirl at the sanguine artistry... the couple moving through the streets like it's the most relaxing stroll ever, butchering everyone along the path.*

[Linked Image from i.imgur.com]

*They keep walking and walking until eventually stepping into the vision of the crimson eclipse, together, holding hands. It's the end of days and they're the only ones left alive*

[Linked Image from i.imgur.com]

*The scene keeps following their walk that keeps going and going and going... with Minthara gently fading away from existence like a beautiful passing memory. This is it. This is the end.*

[Linked Image from i.imgur.com]

*He is all alone now. The world is dead, everyone is gone and his beloved is no more... he is the last offering left for Father, the final kill. The Urge is no more.*

GAME FADES TO BLACK - CUT - THE END.

That is what a Chosen Dark Urge player would expect a proper end with Minthara/Astarion to actually be, easily accomplished with incredibly minor additions and minimum amount of effort required to make the extended cliffhanger a satisfying proper conclusion.

And despite there being no evil epilogues I'd be happy with it because it would at least respect the player agency and especially the previously established character motives. Minthara and Astarion were literally made to be the only companions with us till the very end, wouldn't settle for anything less.