recording should have been the same as previous versions, why was it changed?

When you're on a good thing, stick to it!

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Me thinks its some thing that will eventually get fixed. It was a grate feature in IL-2 so to not have the same in COD would be just plain silly. As with most thing COD PC performance is the biggest priority ATM and track recording hurts this. Hopefully it'll be back in the not to distant future.