The arguments that CC is game-breaking and content-busting are highly theoretical. I've never seen a toon that splashed bard to max ranks in perform for an "easy win" button. I've never seen screenies of bards or CC-sorcs soloing raids and epic content with Devious bonuses. LFMs are not screaming "CC needed!!1" like you see for DPS. Supply and Demand say CC specced casters are often not worth a party slot. This is not what a game-breaking imbalance looks like.
CC can be a powerful tool to help us overcome content more easily and with fewer resources, as do GS equipment and firewall. And I think RadII's and firewall are more systematic problems from a game balance standpoint. A greensteel or firewall nerf would seriously shake up the entire game, creating countless issues. The fact that we can have a debate about whether a CC nerf would even be
noticeable to most players should tell you that CC is not on the same level.
I'm not against shorter durations/lower DCs if there is a good reason for it. But this is not a good reason for it. Shorter durations won't keep most experienced folk from railroading through content **if they want to avoid it.** Haste and clever maneuvering enable groups to leave most mobs in the dust when one needs to. Even 45 seconds of Fascinate would be enough. CC will not be short enough to make people want to "beat" an encounter they are committed to circumvent. And if duration changes won't do it, then changing durations is not a fast and easy way to fix that particular problem.
At best, all this does is make casters and bards infinitesimally more crappy. I think there are better ways of making players engage the content than changing CC durations. "If the fix don't fit, acquit."
