Functions proposeUSDPrice(), approveUSDPrice(), disapproveUSDPrice() are missing the notPaused() modifier on them. This allows the price feed role to update the prices of tokens even when locks and unlocks are paused. There does not seem to be a risk associated with this but it would be better to avoid changes in token prices while the protocol is paused. This does not cause any harm as well since once the protocol wants to unpause, the team can make a pause + update prices batched call to ensure users do not profit or are affected from the previous stale price. 
