I'd settle for just the limits, personally.

The part that makes me the most paranoid is the outbound data. They set every VM up with a 5 Gbps symmetric link, which is cool and all, but then you get charged based on how much data you send. When everything's working properly that's not an issue as the data size is predictable, but if something goes wrong you could end up with a huge bill before you even find out about the problem. My solution, for my own peace of mind, was to configure traffic shaping inside the VM to throttle the uplink to a more manageable speed and then set alarms which will automatically shut down the instance after observing sustained high traffic, either short-term or long-term. That's still reliant on correct configuration, however, and consumes a decent chunk of the free-tier alarms. I'd prefer to be able to set hard spending limits for specific services like CPU time and network traffic and not have to worry about accidentally running up a bill.