That is soo ******* STUPID!! You have all these great modes that you can use created soldier, IW went through the work of adding soldier creation options, yet you have to use a preset character in Extinction mode..... but you can use your custom soldier in co-op modes like Safeguard.
WTF. They should have included Extinction mode in Squads instead of treating it like some story based separate mode type. I don't care what the preset characters say, let people use THEIR OWN created soldier!! I hate premade characters.
At this point I rather play Safeguard or Infected instead of Extinction. What a waste of a mode they only got half right.
Please tell IW to patch Extinction to support created soldiers. A lot of fans prefer their own personalized soldier.