Call of Duty’s old engine prevented female soldiers

 With the multiplayer premier of Call of Duty Ghosts', you all already know that there are female characters that are playable in the game, which is a huge thing for Call of Duty players. Although this should've been an option years ago in past Call of Duty titles made by Infinity Ward,  Mark Rubin commented in a recent interview blaming their out-of-date engine for the prevention of female characters in the battle. yes
"Honestly, adding female soldiers to character customization wasn't about trying to lure more people into the game. It was actually just about acknowledging the people who already play our game," said Rubin, "It wasn't until we rewrote the way character memory is handled - that we could do 'Create-a-Soldier,' that we could do customized characters - that the possibility of having female soldiers really came to fruition.” hmm
This is some valuable information given by Rubin, and it's comforting to know he's supporting both genders in Call of Duty, while taking ideas and implementing them. And if you don't understand what has already been said, it wasn't that they didn't want to add female characters, it's just that they couldn't, because of their engine.  
"Remember you sort of randomly picked which character you were using [in previous Call of Duty games]. So, I might be a woman sometimes and not a woman other times. It didn't really make sense until we created character customization,"
Female characters aren't the only additions being made to the Call of Duty franchise however, but also a much more destructible environment as well as a ton of new perks, kill streaks, weapons, and more. If you haven't already, check out NextGenUpdate's notes taken during the Call of Duty Ghosts Multiplayer Livestream that happened on August 14th.

How do you feel about female characters being added into the game? It's surely something new and Infinity Ward is making a milestone, but what else do you think are bigger problems they need to work on in their games?