I'm back I can play again and I would like to know how much I missed since the 5th update
Dude, just read the changelog: https://docs.google.com/spreadsheets/d/1s2nIsLg-suLVX_O6MgDGtxZDLgmVXvwIzwauNDpU...
Where should I start explaining?
I've been playing every update since update 5 myself.
Also, they even have a draft for a Kickstarter page here: https://docs.google.com/presentation/d/1VJEeZJ1ZfAgzTtecUx0bhSLnLGep9qXJKlNR-E80...
There, you can see some details of their later plans and stretch goals.