[Tin Cup]

Or they could sub out. To answer the q--a coach has to evaluate his players and their defensive/offensive abilities before an option. Pros and cons are somewhat easy to decide.
5-1 One setter constantly works with the same hitters building and learning each. As Deathstar stated 5-1 is used by higher level teams...one of the reasons is their ability to attack off the backrow when the setter comes to the front and run a double middle hit with a backrow attack especially with mens competition. Backrow attacks are very common on the elite and international levels. A disadvantage is can you setter block? If they can't you "must" have a strong and quick MB or you get what all hitters want one on one. A smart team can also constantly attack the setter keeping them from running offense.

IF you have the players...double and triple blocking is the way to go with a 6-2 JMO. The mens international game is amazing with their triple blocks. I've seen 7'2"--7'--6'8" front lines. You will have two setters but each setter will only have the same number hitters as the 5-1. Hitters will to adapt to each setter. If the setters become hitters and the primary setter must take first ball--there is another setter which can only help.

Glad to see fans & players becoming more educated on this great game. Didn't see these type of q's 3-4-5 years ago.