You're also a Delta Reserve member, for which fees are waived. The fees of $75/$100/$150 for award tickets less than 21 days out still seem new and shocking to me, as do the redeposit fees.

WorldPerks Silver Elite used to get a 50% mileage bonus instead of a 25% also, but I can't remember when that changed, whether it was pre- or post-merger. Coupled with the higher redemption values (e.g., 60,000 vs 40,000 miles for a transatlantic flight), "free" flights cost a lot more.