In a recent IGN interview, it is briefly mentioned that the Classic team is looking at possible changes to raid lockouts, so that players don't feel obligated running four versions of a single raid (25-man Heroic, 25-man Normal, 10-man Heroic, and 10-man Normal).
Wrath Classic Expansion RevealClassic Wrath Releasing 2022 Wrath of the Lich King Classic Trailer Expansion FeaturesRaid Lockout Changes Dungeon Finder Removed Level 70 Boosts Death Knights Available in Pre-PatchIGN World of Warcraft: Classic Gets Wrath of the Lich King Expansion Later This Year
The Classic team is also looking at some adjustments to the raiding and lockout systems, so players don't feel obligated to run four versions of the same raid per week to optimize their characters. Read more on wowhead.com