We have a saying: “You can never have too much base”
We have been encouraging everyone we speak to to consider these cancelled events and restricted access times as a blessing in disguise. You can and should extend your base period. More will always benefit you.
As to when and how to add intensity. Have you read this article? Use the guidelines laid out in that. Provided you do not have severe ADS there will be some benefit to adding some intensity to your program.