EIP-712 Motivation is to improve the usability of off-chain message signing for use on-chain.
By not adhering to it, users will find more difficulty understanding what they are signing, as off-chain tools will have trouble decoding the messsage, leading to a compatibility and integration issue.
Signatures can also be replayed on other contracts, as the contract address is not included in the message hash.
Message hashes are implemented without following specs by EIP-712, missing the typeHash, and the domainSeparator.
AccessManager.sol#L53
BootstrapBallot.sol#L53-L54
Follow the EIP-712 spec, including the corresponding typeHash, domainSeparator, contract address, and build the message hash accordingly.
