PC Gamer put together a list of wishes for XCOM DLC. Most of them actually seem like things that would be fixed with patches. More map variation would definitely be good. Expansion of character customization is a must. The level of attachment is already there, think of how intense it could be if you could more closely match the look and style of the people your characters were representing. The Elite Soldier Pack was nice, but fairly limited in its scope.
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