Why not give each game its time, for example, one update there and then an update here and then there, and life goes on.
With the satisfaction of all parties.
thats kinda hard, if the dev decides to do as you said, the other game will be left in an undeveloped state causing the players to bother the devs to fix... so i guess the dev focusing on LSH is a better option
And lustful spirits was a game made from 0 so, yeah....
