This "rose tinted glasses" phrases gets thrown around left and right on this forum so much that it's lost all meaning entirely...
First of all nothing I'm saying is based off assumptions, yes the game was newer and that most definitely added to its subscriber base but it doesn't account for all of it. The game had a very direct route of progression in vanilla, tbc, and even wrath. Attunements set the course for vanilla/tbc due to the game being in early development and the developers not really knowing how to set the pace for the game.
As far as story telling in raiding goes wrath had an extremely coherent storyline told through its raids and dungeons. Almost the entire story of wrath was told as we reach northrend we quested in our respective zones, cleared out native threats(maly and sarth) then fought our first line of the scourge (naxx), we then worked our way into the northern hills of storm peaks where we freed the keepers of yoggs corruption and quelled the old god threat while learning that this very same old gods blood was used to construct ICC itself! We then went into icecrown and trained an army at the TOC raid, where arthas appears to intervene with anub and we again defeat him. We breach ICCs gates immediately after TOC and fight arthas the main featured villain who quotes everything we did in all other raids and how he pushed us to make us stronger so we could be his new army.
Now tell me how the hell that isn't the ENTIRE expansion told via raids? If you just quested you had absolutely no idea wtf was going on in that expansion. Wrath set the pace for all future expansions and this was WITHOUT raidfinder and easy mode bullshit. If you weren't a hardcore raider back then you most definitely were not killing the current bosses at their time, exactly like now if you aren't a hardcore raider you aren't seeing the special mythic boss fights without YouTube. This isn't new, it isn't surprising, and it most definitely isn't unfair.
Also to hit a few other marks you made:
- I believe in wrath only 3% of the player base did pvp as it was unbalanced and shitty.
- Players had plenty of ways to ease into current raids especially after they introduced 10/25 normal and heroic. If you wanted to raid, you did with ease.
- tbc/wrath were and always will be the highlights of wows history as both games introduced much easier ways to get into raiding yet still offered a challenge unlike current lolfaceroll content(unless you're doing mythic which is pretty much perfectly tuned for the most part.)