If you don't have a VM snapshot to restore, the first thing to try is always restoring the backup from a day before the Up2Date was applied. There might be a better solution, but "broke my VPN/Routing" isn't a description that any of us can do anything with! [;)]
Broke my routing = The NAT between the public IP and the private IP of the Sophos stopped working. I can't explain this. There was no SG change. I could connect to the Sophos internal IP address, but not to anything behind it. It showed the VPNs were up, but nothing was routing. I have two VPNs. Sophos to Sophos, and Sophos to AWS VPN. When I shut down the AWS VPN, my Sophos to Sophos started routing. I could connect to servers behind the Sophos. I could connect to the public IP of the Sophos again. Enabling the Sophos to AWS VPN broke it again. My work around was a new Sophos to handle this VPN.
I don't know what to tell you, Magnus. I have a client with a UTM 9.302 in AWS EC2 and a hardware version on 9.302 connected with an IPsec VPN since both were on V8.2. No problems that I can see.