I'm glad to hear they plan on making Ulduar last a lot longer than the 3 1/2 months it initially did.
Reducing the ilvl of TotC gear is also an interesting decision...and will make ICC harder...for like a week.
Edit:
So ilvls were super screwed up to begin with, I kind of forgot just how all over the place they were.
https://www.warcrafttavern.com/wotlk.../ulduar%20(10/
So the short version:
200--Naxx 10
213--Naxx 25
219--Ulduar 10
226--KT 25, Malygos 25, Sarth + 2 drakes, Uld 10 H, Uld 25 N
232--Uld 10 H Weapons, TotC 10 N, Ony 10
239--Uld 25 H
245--TotC 10 H, TotC 25 N, Ony 25
258--TotC 25 Hard, Halion 10 N
251--ICC 10 N
264--ICC 10 H, ICC 25 N
271--LK 10 H, Halion 25, Halion 10 H
277--ICC 25 H
284--LK 25 H, Halion 25 H
The long version with all the 5-mans:
187--5 man normal dungeons
200--5 man heroics, Naxx 10, Trial of the Champion normal, Sartharion 10
213--Naxx 25, Malygos 10, Sartharion 25, Sartharion 10 + 2 drakes (only 4 items on loot table)
219--Ulduar 10, Heroic Trial of the Champion (the 5-man), ICC 5-mans normal (Pit of Saron, Forge of Souls, Halls of Reflection)
226--Kel'Thuzad 25, Malygos 25*, Sartharion 25 + 2 drakes***, Ulduar 10 Hard Modes** + Algalon (except weapons), Ulduar 25 (except weapons).
*Note that Malygos had no weapons on his loot table (he had trinkets).
**Ulduar hard modes had separate loot tables from normal modes. Trial of the Crusader they were just higher ilvls of the same weapons.
***Only 5 items on his loot table
232--Ulduar 10 Hard Mode Weapons*, Normal Trial of the Crusader, Onyxia 10, ICC 5-mans heroic
*232 weapons from Ulduar are: Aesir's Edge, Hammer of Crushing Whispers, Icecore Staff, Tortured Earth, Boreal Guard, The Caress of Insanity, Combatant's Bootblade, Perilous Bite, Serilas Blood Blade of Invar One-Arm, Shiver, Magnetized Projectile Emitter, Twirling Blades, and some off-hands)
239--Ulduar 25 Hard Mode, and weapons were back to the same ilvl as everything else
245--TotC 10 Hard, TotC 25 normal, Onyxia 25, Val'anyr
258--TotC 25 Hard, Halion 10 normal
251--ICC 10 normal
264--ICC 10 Hard, ICC 25 normal
271--Lich King 10 Hard (he only had weapons on his loot table, listed below), Halion 25, Halion 10 Hard
277--ICC 25 Hard
284--Lich King 25 Hard (weapons only), Halion 25 Hard, Shadowmourne
And just for fun, Lich King 10 weapons were:
Warmace of Menethil
Halion, Staff of Forgotten Love
Tel'thas, Dagger of the Blood King
Tainted Twig of Nordrassil
Valius, Gavel of the Lightbringer
Windrunner's Heartseeker
Troggbane, Axe of the Frostborne King
Pugius, Fist of Defiance
Stormfury, Black Blade of the Betrayer
LK 25:
Glorenzelg, High-Blade of the Silver Hand
Oathbinder, Charge of the Ranger-General
Fal'inrush, Defender of Quel'thalas
Royal Scepter of Terenas II
Archus, Greatstaff of Antonidas
Havoc's Call, Blade of Lordaeron Kings
Bloodsurge, Kel'Thuzad's Blade of Agony
Heaven's Fall, Kryss of a Thousand Lies
Mithrios, Bronzebeard's Legacy
and Invincible of course
Ok so the rose-tinted glasses are coming off for me, it literally took me over an hour just to look all that up because ilvls were such a mess in Wrath. I remember back in the day even they were saying how having Kel'Thuzad drop 226 weapons caused enormous problems for the rest of the expansion.
Given how messed up ilvls were to begin with...I don't think changing them slightly is going to affect much of anything.