Subscriber here. His "MIA" moments seem to come from him trying to fit so much content into each update, and going over schedule trying to finish each new thing in the update, rather than lack of motivation. He's also talking about how he's trying to get better with communicating (to the point where he's considering making a discord) to anyone hesitant, right now, I would say its worth it to support the game still.
Though, he should definitely try out releasing less per update and updating regularly rather than going dark for awhile just to give everyone a huge update. Would probably be less stress on him.
"I've been thinking about the phone system and have been playing around with the coding a lot. It is a good system but it definitely needs tweaking. Please let me know how you think I should proceed with the phone system (...)I will do a main release this weekend. I will fix bugs and see how the vote goes. The new content will be some stuff I have had partially done, just not ready to implement. So a decent number of new scenes. I don't want to get too bogged down as it will slow down the amount of content getting released. I will also look to open a discord, which will really help with communication. Definitely need to improve on that front."