I like this plan. It’s consistent with the need to periodically rest and reset and avoid 365 days a year of formal training. Your current fitness from the first 14 weeks of the plan is more than enough to jump to Maintenance for a few weeks and then into Week 2+ of the formal plan.
If you are alike most athletes, you’ll feel that the Maintenance is too easy. That’s a good thing. Let it be easy for a few weeks, then come back and kill it for the formal plan.
Strength and conditioning is for sure recommended during this period as well.