You don't really need to worry about him taking his time, he has become a specialist at it. The updates are relatively small, yet it takes him 3 times longer than the likes of Naughty Road who produces once a year a massive update to his game.
Naughty Road knows he can't take on a second development project, because his main game would suffer for it, and updates would be smaller and it would take even longer to create each update. The same has been happening here, each update has gotten slower and slower sadly. With MNM I was expecting a lot more content given it took him a year to create it lol