Clearly you need to put in an effort to read the previous posts.
I did just reread every single post - twice.
You seem to have three major concerns:
1 - that the wait staff will not be tipped appropriately - perfectly valid concern
2 - that since the tip is no longer included, that the guests will tip less or not at all - again, perfectly valid concern
3 - that the guests will complain that they now need to worry about tipping, where they didn't before - I agree, some will
But from those points, you try and draw the conclusion that it would be stupid for Disney to offer the free dining plan again. Here is where I disagree with you.
The free dining plan is a big draw - people like getting something for free, even if it comes out to be not free since they don't get a room discount or need to pay tips out of pocket.
As long as people feel they are getting something for free, like a certain number of meals in their trip - the promotion will be a success - and it will fill rooms on property.
That is ALL that Disney cares about - getting the bodies on property, into the theme parks, into the restaurants, and into the gift shops - to spend their vacation money.
As long as that promotion continues to draw people, Disney will continue to offer it.
They are not going to stop offering it because the wait staff is unhappy, unfortunately.