But your argument is based entirely on your own experience and nothing else, which is completely and utterly invalid.
We literally have statistic through WCL to prove you are completely wrong.
For English EU guilds, Naxx mythic 20 man has a total of 411 guilds log the raid, 216 of them killing KT. So that give us a good benchmark.
Now look at SE, EU English Guilds again. a total of only 90 guild have logged kills in the raid (yes i get its week one so we can expect lower numbers overall, but only 90 out of a potential 411? That is pretty clear that a lot of team are actually stuck on the first boss or have moved to larger teams). You can prove this further looking at all the wipe logs showing more 20 man teams failing on the first boss and therefore not contributing to the overall guild number.
Out of the 90 guild logging kills, 40 of them only killed 1 boss and consider that the people going 20 man in week one are some of the highest parses in the game.
This is a raid said to be balanced around 20 man, so why are so many struggling and okay, a lot of guild maintain a raid team of 20-25 people so they can keep going when people takes a week off.
But just look at the majority of people logging in the 40 man category The rank 1 EU guild had a total of 76 unique characters, they where 40 manning a raid designed for 20 over multiple nights pugging in loads of people to make it up damage and healing required.
You can check the logs yourself. The average raid team, composed of 20 to 25 people can’t kill this boss and are relying on stacking up to 30 to 40 people to get the 2nd boss down and suggesting that guilds should go up to extreme sizes to clear as it was is ridiculous.
That being said, lucky, Blizzard listened to people with sense and already nerfed it.
I also agree with their sentiment in their update post, if this had been the 4th or 5th boss, I wouldn’t mind the original difficulty, it feels good to progress, get some gear, hit a wall, come in next week and do better, but stonewalling the vast majority of groups or any normal size at the second boss is not good design or fun, it’s just bad and yes, pushing back Ashbringer in the final phase will lead to people quitting sooner…
The population of the game will get lower and lower each week past this point, a lot of people might stay for Ashbringer as final goal, but if you are already 3rd, 4th, 5th on the list to get it in your guild, pushing that back another week will demoralise people.
People cleared naxx in vanilla and that gear was good into the first raid tier of TBC, the character continues to exist and having that stuff from current content meant something. SoD is endling, sure the servers might stay up, just like era, dead… It’s not the same as expansions.
But again, difficulty wasn’t the issue, it was the order, every group said the 3rd and 4th boss where much easier than the 2nd, swap them around and most people would have been fine with it.