We may well really need this kind of tracing, and frankly it would be useful if we had had it since it would have and will save lives. Do I think it is sensibl

We may well really need this kind of tracing, and frankly it would be useful if we had had it since it would have and will save lives. Do I think it is sensible to raise concerns? Yes Am I disappointed that there aren't specific suggestions to address issues? Yes It is really easy to criticise and a lot more difficult to come up with solutions. As an expert in privacy, I'd have liked to see specific actionable items. e.g. 'Google/Apple must do X to ensure Y' or something saying 'Yes, this is really difficult and I don't know the answer'. This opens the floor for collaboration and for suggestions which feels a lot more constructive. What's key is that this is done right. If it isn't done right, there's a risk that no one will install it and we don't get the protection.