I'm going to miss using Scorpion Wire to catch up to fleeing foes (that are out of combat) and other close-range scenarios where someone could mount up if out of combat. Sometimes it's fun to use pulls instead of personal movement, shadowstep, and teleport skills. Please make it so the Warclaw is affected by CC, or give them a small defiance bar that at least delays the effect of the CC by a few seconds.
Instead of giving Warclaw permanent CC immunity, ArenaNet could add a mount skill with a 30+ second recharge that would give the Warclaw stability / CC immunity for 5–10 seconds. This would keep it useful in initiating big zerg fights. This skill could be buffed further if people thing the mount dies far too easily, as the Warclaw does not have Bond of Life.
Let me know what you think.