I guess it depends on what the designer is and what it's trying to do.
How much power does the designer have? How much forsight? How much control does it have over the universe? Was the universe designed by this designer, or is the designer simply a guest? How involved does it wish to be with its creations?
If we're talking about an all powerful God, it would be able to magick its creations to be perfectly adapted to the environment at any given time. Why would the designer make an environment that changed in the first place?
Personally, I think that the Darwinian algorithm for adaptation is extremely sloppy. Considering the amount of pain and death that goes into weeding out less adapted creatures, I'd say it's downright cruel as well.