Could the default for single person joining the raid be changed from Group Leader to NoGroup. When forming a raid once 12 group leaders (with the mass invite this happens on the first click) have been reached no one can be invited until the raid leader designates the group leaders to NoGroup. I'm sure most if not all raid leaders would agree this is very annoying and time consuming to say the least.
Amen. Also, with the new option to invite all online players, you still get stuck after the first 12 accept, and you have to lock the raid, move people around, and then invite again, this time with less going to the bottom section as group leaders because of the groups started at the top.
