In theory that is exactly what they are doing right now. Since Nomo is also the guy behind the story and character personalities, i doubt that we'd get a story focused quest, but the writer and the coder said that they are trying to cook something up by the end of october.Even if the artist is MIA they can use the already existing assets to move forward, it's not like the new art is anything amazing. Is it lazy? Sure, but it's also the most cost/time effective way of doing things at this point not to mention they've already been reusing assets over the past few updates. I'm half tempted to mod the game myself. Between this, SS and Seeds of Chaos I swear every 2D game on this site that started around 2016 is cursed.
Take it with the usual slab of salt, but at least the correct idea came to them eventually.