Yes they should have a see PT/Time feature for sure. Cause when you get a party with no healer+tank your pretty much screwed(Unless more tanks/healers start using "Join in progress" too).
Even worse is when there is a stubborn person where they insist that looking for members solo is more effective then requeing since they had to wait 30min's+, so you leave and join another "Join in Progress" que and get the same persons party over and over...