Answer:
Some Americans felt that the Articles of Confederation was not sufficient for the new nation because Congress had little power. Other than the few things they were able to do, the rest of the power belonged to the states. I think it was most important to correct that Congress wasn't able to enforce any of its powers, and also unable to collect state debts. If Congress couldn't enforce any of its powers, it couldn't really control anything. If they were also unable to collect state debts, then they wouldn't have enough money either. Money was essential, since if Congress didn't have money or enough power, they were pretty much almost pointless.
Hope this helped!