Please also enable the non-address versions. Like:
2 KeyA KeyB 2 OP_CHECKMULTISIG
1 KeyNormal KeyBackup 2 OP_CHECKMULTISIG
2 KeyA KeyB 2 OP_CHECKMULTISIG
1 KeyNormal KeyBackup 2 OP_CHECKMULTISIG
Those are "Proposal 1" -- enabling all the 'plain-old' OP_CHECKMULTISIG transactions.
groffer reports finding a bug in CHECKMULTISIG (pops too many items off the stack), which makes me wonder if it would be better to avoid it. For small n, using CHECKSIG multiple times is straightforward and doesn't make the transactions much larger.
The (a and b) OR c transaction with public keys instead of addresses isn't in the proposal, but for consistency's sake I agree it should be.