to the its not hard for blizzard to do whatever in game can you actually say that are you a artist that can design something in game and make it work without bugs can you write endless lines of code to make a npc do what he is suposed to do for millions of people, and can you make a game that will last 10 years and have over 7 mil subs and run a multi million dollar company and make new content at a steady pace for those 4-7 million people (adding in extra accounts) can you ....i mean dont you think if blizzard would do it faster to keep people from not bitching all day every day about how pvpers get a extra season and raiders dont dont you think they would ?
It isn't a matter of "if they could" but "if they should". Anything they add between now and beta pushes back beta, which pushes back release. A new raid would add an extra month or two for people who would otherwise cancel, sure. But they would almost certainly be out the same amount of money because those same accounts will be dormant once they consume the "extra" content anyways.