Yes, crowd control (or CC as it's been nicknamed in gaming) is an advanced combat mechanic accomplished by such spells like bind and sleep, so that a group of monsters does not overwhelm you.
I'm really not trying to be snarky or troll here, but one reason these threads aren't looked at is because they aren't tagged properly. Plus, tagging isn't done through the title, it must be tagged at the bottom.
I'm only saying this because this is actually a topic that I believe to be very important. One thing that plagues FFXIV is the lack of community, and the tools to manage it.
I personally felt that FFXI didn't have robust enough linkshell management. To actually go backward in that regard is frustrating. The only thing that is an improvement over FFXI is the fact we can see the member list (including who is online, and who is offline).
What is truly a community-breaking issue is the fact that linkshells must break and reform when they reach their member limit because of how many people have quit the game and cannot be removed from the LS roster. How many members are permanently lost when they return to the game, only to find they are no longer in a linkshell? There is no messaging system, so they quite possibly have no way of knowing that the linkshell has reformed. They simply assume it was disbanded or that they were forcibly removed. If we were allowed to prune offline members who have quit with no intention of returning, this wouldn't be happening.