Wrath Classic just got a Beta update 3 days before release, making real first achievements unavailable for 24 hours after transfers, raids counting towards the 5 instance per hour limit and some changes to the Will of Sartharion.

(Source)

Beta Updates
September 23, 2022

Realm first Achievements are now unavailable for 24 hours after a player-character takes a free transfer to another realm (was 60 days).

Developers’ notes: This is intended to eliminate a concern that some players might have about using Free Transfers to move to a realm that isn’t overcrowded.

Will of Sartharion now increases Sartharion’s health by 25% with 1 drake alive, 45% with 2 drakes alive, and 65% with three drakes alive (was 25%).

Developers’ notes: Sarth+3 should still be quite manageable, but the unintended strategy of simply burning down the boss should be much less viable. Please note that the in-game tooltip is currently incorrect and will be updated in the future.

Raids will now count towards the 5 instance-per-hour limit.

Developers’ notes: The hourly instance limit prevents players from entering instances that they’ve entered at least once already within the last hour. With this change, farming a dungeon should not prevent you from entering a raid instance, so long as you don’t attempt to reset and re-enter that raid instance multiple times.

The costs and availability of Season 5 Arena gear have been adjusted to their final values.

Developers’ notes: There were previously some inconsistencies on PvP gear from season to season, especially with rating requirements. This update fixes Savage and Hateful Arena gear so that they require both Honor Point and Arena Point costs (where intended). Previously in the Wrath Beta, they were sold for Arena Points only. As a reminder, the vendors that offer Arena gear in Dalaran, Area 52, Gadgetzan, and the PvP Barracks in capital cities will not sell Season 5 gear to you until Season 5 begins. Savage Arena gear will be purchaseable for only Honor in capital cities, but is sold for Arena Points + Honor in Gadgetzan, Area 52, and Dalaran. This is intended and corresponds with original Wrath of the Lich King.