I expect because what they're heading for is a all-in-one service that they can manage updates, statistics, usage, locale, DLC and monitor for cheating, hacks, piracy, etc and make it all more accessible to the majority of gamers (the casuals). The benefits for THEM are huge...and therein lies the problem. They are thinking TOO much about themselves and that's what has riled certain pockets of PC gamers.
If they offered dedicated servers as well as IWnet then there's very little reason for gamers to use their service; something they've probably piled lots of money in to and want to lock you in to. It probably ties in to marketing as well - to use the game on IWnet etc you'll no doubt have to pass over your email at some stage, discounts on pre-ordering DLC..all that stuff.
Oh come on, you can do better than that.
My opinions are just as valid as yours. I've played online PC games for many years.
They create new matchmaking areas for people with the maps but they don't delete the old ones, and all of them are updated regularly. Then when the map packs become free they get included into all the matchmaking areas.
I love me cheeseburgers
