You can and should create an Express Entry profile. There are no costs associated with the task of creating a profile. If your points are over 460, you will only miss out on any ITA if a draw happens this week, by delaying your profile creation.
What kind of policy or process changes will impact your profile creation? Unless they are going to scrap the whole system, the likelihood of which is minimal, your EE profile will remain the same irrespective of policy changes.
I don't think there is going to be any changes in EE for the new year. Some PNP quotas will reopen and they will start accepting letter of intents/interests, and I don't see any reasons why you would want to delay by 3 days.