That’s a great analogy. The USCCB is not a legislative body nor a court. When they meet twice a year, there are two main objectives. 1) to vote on things that need to be sent to the Holy See (the items in the first post all fall into that category) and 2) to formally act on things they have been directed to by the Holy See (such as approving the English translation of the Missal several years back).
Yes, there are lots of possibly more important issues but they aren’t handled at the semi-annual meetings. They are either handled at a more universal level (such as the CDW for liturgical abuse) or by the standing committees that work all year round (such as crafting documents on pressing issues like immigration, respect for life, religious liberty, etc).