There have been many, actually. The overall sentiment is anger. The experts aren't happy that the bill doesn't include such measures, measures that have been sought for years and recommended in various reports by the Chief Electoral Officer and the commissioner. They are also angry that the people trying to prevent fraud lack the tools they need to do just that in the future. These are the people who know the system best. They should have been consulted on what changes needed to be made to the Elections Canada Act. That didn't happen, however.
Lastly, I can't wrap my head around the fact that the proposed changes to the Elections Canada Act aimed at rectifying the problem are actually measures that will prevent some people from voting. I can't see how taking away some people's right to vote bears any relation to fixing what happened.