They didn't actually renew for DL. The original ticket deal released earlier this year goes through Dec 2022, BUT the limit is still 6 tickets, so if you buy all 6 and use them in 2021, you're out of luck for next year. The resort discount is also good until Dec 2022, and can be used as often as you want.
My guess on what is taking so long is that this is a government contract and the Defense Budget for FY2022 is technically not signed off on yet. Until that happens, they can't sign new contracts. It's usually signed in September, but this year with all the debt ceiling drama, it's been delayed.