Thank you,
The main concerns was that the way the proposal came about with fallback mechanism activated and almost like an emergency upgrade to disable fraud proofs, this resulted in a situation where the network was potentially very close to a major incident in which the security council would have had to step in if anything bad happened or a malicious actor taking advantage.
Some of the concerns that were raised are documented mainly in the Granite Network Upgrade thread, other delegates had issues with how the full audit was not done, and that the fault proof system was outside the scope of the audit. In the ACC internal meeting the L2Beat Delegate representative had shared that such a step was taken in a casual manner, and L2Beat have also documented their concerns :