Well, the trial will be running at those 4 resorts for the next year, much to the delight of dog owners who now have the option to bring their pets along. But for those against the new policy, you can:
1. Continue to let guest relations and management know your concerns and frustrations, keep emailing and calling. Multiple times if you feel it is necessary.
2. Dogs may be allowed now, but there are policies and rules in place, so help Disney police those rules. Call out those dogs and dog owners who aren't being compliant and following the policy. Dog relieving itself in the wrong area, dogs barking too loudly, dogs not being quieted after 30 minutes, dogs not in a carrier, dogs being walked or playing in unauthorized areas, etc etc? Call the front desk, guest relations, take a photo or video, flag down every CM within earshot. Flood the phone lines if the problems continue or aren't being rectified in a timely manner. Make them know they will be requiring additional time and efforts to taking care of these situations - yes, it will be pulling resources away from other guest problems and concerns, but that only brings more light to the issue.
3. Everyone who has a reservation at those 4 resorts and is concerned about cleanliness? Request the deep cleaning before you get your room. There are doubts as to whether this procedure is even being done or to what degree of additional cleaning is actually required by policy, but once again, make Disney put forth extra resources, time, and money into this newly formed policy. If one of Disney's goals was increased profit from this dog policy, show them there could be increased time and financial expenses that come with it too.
4. If someone in your party suffers an allergic reaction because the policies weren't followed? Once again, management needs to know about it.
Those are just a few thoughts of mine on what those who are opposed to the new policy can do. Maybe Disney will think that perhaps building a new resort for pet owners and their pets (let cats, snakes, bunnies, birds come too!) was the better decision.