^So this comes down to "I don't like it, so I declare it an alternate universe"? Good for you.
The Klingon change was far, far more than spines and bumps on their heads. They went from slimy, sly villains to brainless brutes who yell "Honour!" over and over. They are not the same in anything but name. The Trill not only went from bumps to spots, but their way of life, the way symbiots are treated and the way hosts lived changed greatly too. These things make a difference to Star Trek in a very big way - they alter the stories that underly everything. The sets, CG's and brief shots of background cities don't.
The Klingon change was far, far more than spines and bumps on their heads. They went from slimy, sly villains to brainless brutes who yell "Honour!" over and over. They are not the same in anything but name. The Trill not only went from bumps to spots, but their way of life, the way symbiots are treated and the way hosts lived changed greatly too. These things make a difference to Star Trek in a very big way - they alter the stories that underly everything. The sets, CG's and brief shots of background cities don't.