In the end, when a game is finished is up to the dev's discretion.
If Luxee considers they can still improve the game as their own skills improve, then it's up to them to decide if they want to rework some stuff or not.
And creative people tend to be both perfectionnists, and eternally unsatisfied of the "finished" state of their work.
Plus, more often than not, devs tend to have to sacrifice things they want to add, be it because of a lack of skill to do exactly what they envisioned, or because players keep whinning about wanting an update. Also some ideas come after the facts.
So, even if you'd like Luxee to work solely on something else, you should probably be a bit more thankfull that they're willing to add more content instead of quickly finishing their game and bailing out like to many other devs (some of wich don't even bother
finishing their games before cashing out).
...and other funny jokes you can tell yourself....
Nobody asked for a 274 render scene with Eric, whether Luxxee wants that or not not irrelevant.
That's the thing, buddy. You have no say in the matter. Luxee's will is this only relevant part, as they're the dev. What YOU want and order is irrelevant. Luxee isn't making the game for you. You have no say in what they do. Even if you are supporting them on Patreon/SS/whatever, you still have no say in it unless the tier specifically says "You decide what I do with my game", which never happens.