If you're dropping from Marshmallows, I'll probably leave as well (I'm TalynRahl). Guilds been dead for a while, it's kinda sad.
Kinda get the feeling that there's a new update coming soon... As you said it's been a fair amount of time since the last major update.
Unless they're quiet because they're working up to ClickerHeroes 2, and this game is basically dead now.