We've only dealt with 2 IK's and that took 75% of the game .... we have the goddesses, Aram and the other IK's to go and whatever other bits left to tie it all up in a neat bow ... in 25% or less.
The first IK was an idiot and we were massively underpowered compared to him. The second IK was about on our level and we were on his home turf. Now Simon is probably the most powerful IK, and definitely the one with the most territory and political power. I don't expect resolving the remaining plot to require as much attention to each enemy.
Also, I don't expect the remaining major players to just sit and wait to be picked off; I expect them to interact. Maybe the Lord of Blood comes out of hiding and mutually annihilates the Lustlord in a desperate bid for power and relevance. Maybe Ginasta snaps out of her funk and kills the Anak or even the Mother. Many possibilities.
Regardless, the dev stated somewhere that the plot has been planned out from the beginning. I definitely don't expect our conflicts with the remaining powers to go the same way as previous ones, for meta reasons of plot variety if nothing else.
Is the dev tired of the game and wants to move on? Rushing to the end is almost as bad as leaving it a cliffhanger. Maybe if the dev were to take a 3-6 month hiatus and maybe play some popular adult games, then they could return energized and seek a proper ending for their patrons and fans.
The dev takes month breaks from the project occasionally. Those are the months when no TLS update happens, and instead there's a side project like a novella. Given that this seems to be ok with the patrons, there's really no incentive to rush development. If anything, concern over whether some patrons will stick around for the next years-long project is a motivator to take her time fleshing out everything.
Really, the dev's track record is great. I can't sympathize with these sudden worries about a rushed ending.