Ag Chairman - I thought they rejected the vice chair acting as chair. This is important unless the qualification of the two is the same.
Quorum - I didn't see the point. They should designate issues that need majority of all the members (4) and have 3 as the quorum for other usual sittings and decisions. Quorum is meant to keep the body running smoothly on a daily basis. Just like parliament where constitutional amendment requires 2/3 of total while normal bills and motions require majority of 30% quorum.