The current plan is to reduce effectiveness of crowd control spells in Arena Combat. It’s not sure at the moment if this will also carry over to battlegrounds, but it is a possibility.

What we're looking into is having reduced duration of crowd control spells to prevent extended removal from combat. Outside of PvP areas such as arenas, spells will operate as normal, according to their tooltip. Inside a PvP area, a spell which may have had a 15 second duration will be reduced to a 10 or 5 second duration. The details of duration are not specific, we’re merely using these numbers to illustrate the point and intent.

So, while we don't plan on disabling CC in AC ASAP, we do intend to decrease its potential for extended incapacitation.

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I might be short, i might be blue,
but in the end i Pew Pew Pew!
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Aeus, locking threads since 2005.