I agree that it's WOTC's job to write down guidelines for common situations. Rare situations can always be decided by the DM, but I want a central rule for how to break a wooden door, or how many damage a falling rock does. This improves playing speed as well as internal consistency of the game world.
(edit) Also, I don't have a problem with a dragon pinning the wizard or cleric and giving him no chance at all to escape physically (unless e.g. they have MC'ed to rogue for an escape artist ability). This is still a team game, so your friends can bail you out; or perhaps you could use magic to escape.