Originally, all of tier 2 dropped off of bosses in the first tier of raiding (meaning: Onyxia and Molten Core). It was not until patch 1.4 (two months before BWL release) until this was changed.
From Wowwiki for patch 1.4.0: "Prior to this patch, Molten Core boss creatures could drop items from one of two different tiered sets for every character class. The loot tables have been changed so Molten Core bosses will now only drop items from the lower tier class sets."
In patch 1.5 (one month prior to release of BWL), the items were updated to reflect what they are in patch 1.12. From Wowwiki for patch 1.5.0: "The following item sets have had their statistics, effects, and set bonuses updated:
It would immensely enhance our vanilla experience if these 'blizzlike' changes are implemented on Kronos.
From Wowwiki for patch 1.4.0: "Prior to this patch, Molten Core boss creatures could drop items from one of two different tiered sets for every character class. The loot tables have been changed so Molten Core bosses will now only drop items from the lower tier class sets."
In patch 1.5 (one month prior to release of BWL), the items were updated to reflect what they are in patch 1.12. From Wowwiki for patch 1.5.0: "The following item sets have had their statistics, effects, and set bonuses updated:
- Arcanist, Netherwind, Prophecy, Transcendence, Felheart, Nemesis, Cenarion, Stormrage Raiment, Nightslayer, Bloodfang, Giantstalker, Dragonstalker, Earthfury, Ten Storms, Might, Wrath, Lawbringer, and Judgement. "
It would immensely enhance our vanilla experience if these 'blizzlike' changes are implemented on Kronos.