From a logical standpoint, I can see the argument about stun breaking a channeled ability - but arguing logic and realism in an MMO where you don't permanently break your body jumping off an insane cliff or other such illogical things is probably a bad point to tout, lol.

I imagine this change was definitely a PvP change and probably can't be separated from PvE like other abilities due to system restrictions so they made the change universal. Am I perturbed about it? Just slightly, but it's nothing I can't work around either. This is more of a minor inconvenience more than naught in my book.