GUCs need a program change auto clearing into D1.
Access to new premium "'D1" lounge in JFK in LAX including when not flying in a premium cabin. I highly suspect this is coming, as this was hinted to me by a JFK DL Premium Services agent last month and why Delta has neither announced the naming of the new lounge nor updated the 'enhanced' 2025 DM Choice Benefits. The upcoming JFK lounge will be larger (36,000 sq ft) than the current B concourse Sky Club (27,000 sq ft).
Gifting RUC's and GUC's to family/friends with no restriction such as flying on same itinerary as the Diamond or using to upgrade family/friend to the same paid cabin class as the traveling Diamond, as a DM in 2025 will already be purchasing premium fare tickets for the $35k in required spend.
Gifting PM in lieu of GM with no choice benefits.
Hidden benefit, VIP escort service at hub airports and increased Porsche connecting flight transfers at hubs.