Story of 90% of patreon games, honestly. It's not like the game in its current state is irredeemable garbage, far from it. This game is just veering off-course slowly, if the devs put in a modicum of care and effort, they can bring it back with ease and keep things going in a way that satisfies a far larger number of players.
But again, they appear to be quite lazy and content, which is a shame cause that means there's a chance we'll never get to see a satisfying ending(s) for Sabia on her journey, I do want to see how they'd approach it, will they allow some endings to get as far as her mother/sister? Or will they just end after Sabia has a sizeable orc following? I hope we do get to see at least one actual ending before the devs get bored and move on to a new project, though their other game, NN, is fully completed with plenty of interesting endings, so that's something to consider.
This game could go in even more directions in terms of an ending. Noxian nights endings were pretty much perfect because everything was covered but Kingdom of deception was intended to be even bigger. The person below you already gave a few options but I'll type what I think would be best:
Classic bad end: Sabia losses to her mother and sister in the "final battle" or however it plays out and it skips to several months/years into the future showing Sabia completely naked being used as a footstool by her sister/mother, and you could get really creative with this but the point is humiliation. Lick her boots, whip her, insult her, whore her out. You could even extent this further in time and show Sabia being visited in the whore house by these 2.
Classic good end: Sabia wins, sister and mother get railed by orcs, choice to execute them or make them whores, time jump to their new "job"
Whore end: Sabia gets broken by orc cock and chooses serving orcs instead of revenge
Kira/Bris end: title says everything, Sabia relies too much on either and is forced to become their sex slave to pay them back
Dominatrix end: this one is not possible because the Dom playthrough is dead but I'd say it's a good idea, instead or begging Kira/Bris for help, you enslave them, cutscene of the famous Kira x Sabia bad end reversed.
Surrender end: Sabia surrenders to her family, cut scene to her getting railed by minotaurs as punishment
Neve end: name speaks for itself, for the lesbian fans
Kia x tentacle end: Sabia joins these 2, tentacle scene
Ornshakar bad end: Sabia becomes his slave, she gives him a blowjob and then he orders the camp to get in line...
I can think of way more but I don't want to spam too much, but notice all of these endings contain porn, like Noxian nights, you could add more endings without porn (but I didn't because it's a porn game after all and I hate how Sabia is portrayed as not enjoying it which is another topic) or you could add endings that take part in minotaur settlements, cat girl settlements etc. They could get so creative but the work ethic isn't there so all of this is just day dreaming.