This is a subject I know quite a bit about. My wife is a career biologist with the U.S. Fish & Wildlife Service, which is the agency in charge of administering and enforcing the ESA. I see nothing in the proposal that will change an awful lot, except for making species data more easily disseminated.
Everyone loves to demonize Federal employees, especially those who have any potential impact on land use. But many don't realize the tip-toe dance the USF&W Service makes in an effort to please a whole host of special interests. They just don't go out willy-nilly and list species on a whim. As a matter of fact, if you want to discuss wasting tax dollars, there are some enviro groups who actively and constantly sue the USF&W to list species they feel need to be added to threatened or endangered lists, but don't meet the criteria of the ESA. A considerable amount of money and resources are spent answering these lawsuits.
I'm just like the rest of you. I'm a miner, and am outraged over unnecessary issues and oversteps that affect our ability to recover gold. But let's keep our focus, and not lose sight of the true villains in this battle. The ESA is important, and while it is unfortunate that some lands have been removed from use because of listed species, I, for one, am glad that there is at least some process to protect what's left of our natural resources. The ESA is only the legal description, enforced by the USF&W. We should be angry at the farmers and ranchers in California for polluting rivers and streams, and the stocking of non-native trout, forcing the protection status for the red-legged frog...not the USF&W Service for responding to the crisis. In each case of land restrictions as a result of the ESA, it is land abuse creating the problem by short-sighted or greedy individuals -- not the Feds.
If left to State or local interests, you would see a lot more species going extinct. I don't think anyone wants that. Many endangered or threatened species are like the proverbial canary in a coal mine -- they are our early warning system for problems that can eventually affect the health of other animals, even human health.
The USF&W Service does a lot of good, that doesn't get much media coverage. They fund many, many environmental projects which restore lands and wetlands that have been destroyed by poor agriculture or industrial projects. There are many successes of species that were on the brink of extinction, which have been restored to healthy levels. It serves everyone to have such an agency on a centralized, Federal level. Local administrators of a similar agency would not be able to do what's required effectively, and would cave to local interests instead of the greater good.