leave our present Constitution alone we have enough problems electing people that will obey it.
That is up to each state legislature. The could send one delegate or 100. Still only one vote. Up to them.
There are a few changes that might be worth considering, especially if they had the punishments already described. OneWingedShark's Amendment Booklet gives some ideas how, esp. Sections 6 & 8 of his "Fiscal Responsibility" Amendment.