You do understand that the "raid day" starts maybe 4+ hours before the raid for a lot of people, farming shards, summoning people, clearing and kiting dm, managing dm group, setting up raid groups, choosing who gets to raid, assignments and god knows what else needs to be done. People going the extra mile might even be leeching rend buff from xxlegolasfrodoxx that randomly pops in the middle of the night, getting sand buff, blasted lands buffs. If the songflower change means we also need to camp a spawn and pre-buff it's just adding even more time wasted on getting the buffs. I can't stress it enough that there are people that have been doing this for 2 whole years now and it is becoming a chore.
If the solution is "then don't get buffs!" then you can't compete on dps. "Then remove world buffs from raids!" Then realmplayers/kronos-logs have to wipe their data/store them as legacy records. It would also be a big hit to people's sense of progression as they have been raiding with X damage for years now and then suddenly you are limited to like half the damage you were used to be doing.