many folks are missing the reasons for taking the tip out in the first place. in addition to Disney making more bank on the deal... the server has to work for the tip, nothing is automatic, the customer is in control... this will improve the level of service. Bad Waitrons will not get tipped (paid) as well, they will either have to improve, move on, or just know they aren't making as much as their more proficient co-workers.
the few times I got bad service when the DDP included tip I just felt ripped off. I got bad service, and there was nothing I could do, other than tell a manager, and in one case the manager was a bigger looser that the lousy server.
While the DDP is not as big a value as it used to be, it is still a value if used proficiently.