The Greatest Hits pack is not the same thing as the classic helmets pack that comes Feb. 9. The greatest hits pack is a returning limited-time pack that unlocks some of the most popular existing helmets/armors in Halo 5. If you are getting XP boosts, it means your REQ collection is currently complete.
<couldn't post earlier because id reached my post cap for the day>
Cheers - appreciate the response. I understand ive made a stuff up here - a painful one. Have to say its pretty unfortunate timing and imagery when they have been teasing these new helmets (i hadnt read the CU yet - so now know the new helmets come out feb 9). anyways at the end of the day its imaginary currency in a game - bigger things to worry about.
you can close the thread.