Anyone who thinks subscription numbers is the only metric for success is just wrong and is intentionally over simplifying people gaming habits/lives if you truly think that. I also happen to think overall the game has improved dramatically with EVERY expansion. While raiding in burning crusade was very good, it is in my opinion better now. A great deal of the "game was best when" statements really are "i had the most fun when" (which incidentally is a good metric of a good game) and people seem to forget a large portion of that was socially the game ebbs and flow as well and often those times when it was best for that individual socially, eg you were in a raid with people you actually liked or had groups to PvP with etc. All those things are still possible it just depends what you want to get out of your time online.