If the citizens were not required to serve on jury, we had to rely solely on government decision to establish the law.
This actually had a lot of negative outcomes. Such as the people could no longer held the power in lawmaking process which cause government could do whatever they like.
The Great Compromise solved the problem of representation because it included both equal representation and proportional representation. The large states got the House which was proportional representation and the small states got the Senate which was equal representation.