A major PvP change in this week's Beta development notes, the stacking No-Show deserter debuff applied by leaving a Solo Shuffle or Battleground Blitz match is now account-wide, preventing players from requeuing on any character for the duration!
Intended to dissuade players from leaving losing matches, the debuff also comes with a rating penalty, though does warn players of the consequences. Those who excessively leave matches early are also subject to account review and suspensions, as abandoning matches repeatedly is a violation of the terms of service via exploiting functionality to the detriment of the game environment and the intended player experience.