One potential positive is that it may help foster actual cooperation between the parties when a new problem arises that really needs some solution not covered b

One potential positive is that it may help foster actual cooperation between the parties when a new problem arises that really needs some solution not covered by existing law instead of just relying on the executive to fix things. Once you start cooperating on some things, it's much easier to cooperate on more difficult issues. Most politicians are not extremists who would rather see the US become a failed state than cooperate with their political opponents. It would be like a (mentally healthy) married couple choosing homelessness because they disagree over what color the walls should be.