The current buff system is very inadequate for the 4.0 patch due to the power of the new gems that get released.
Currently Dawn of Glories give 15% Magic/Melee/Healing/Ranged Attack and in 4.0 that would be completely awful due to the fact that most players will experience a massive surge in their crit damage/bonus as well as their critical rate due to the new gems, this is also why Spellbook: Unstoppable Force was removed, to prevent overkill. Keeping the Toughness and Resilience Dawn of Glory also causes problems because with the new gems people will have some absurd levels of mitigation and become basically unkillable (healers + skullknights).
It is worth mentioning that the War Drum Buff also receives a massive buff in 4.0, as reads below:
- Improved the War Drum by reducing crafting cost, changing the effects to grant Attack, Magic Attack, and Healing Power +5% with Received Damage -5%. The item is now consumable and can be used for 30
I believe the buff to the war drum buff more than makes up for the loss of things such as Runes and Unstoppable spellbooks / dampened honor pots. It is also worth noting that resplendant tempers that go up to 118% are being added, so the attack deficit is lessened even further.
These issues aside, there is also a major issue of the patches including 3.5 and before where there are too many buffs available, and because of this there needs to be some buff condensation / removal regardless of preference. If you're in a family, have a language book, have a labor stipend, have a statue buff, have a title on, and are fully potted, you might not even get songs in a raid, or your health lift or ditty buff might get knocked off every other minute due to the buff cap.