If the answer is Eclipse, you're asking the wrong question. Unless that question is "how can I nuke my productivity?", or "we're developing in Java, what's the worst that can happen?".
I am sorry if you are not productive in Eclipse, perhaps compared to other tools. I write software every day, and Eclipse ended allowing me to have the highest productivity of all tools I surveyed in the blog post. I wanted to write a simple robot automation library, and I was struggling at every step with other tools, but with Eclipse I was able to get going very quickly and build, refactor, test my code rapidly. This is what I've been looking for, this is what native Arduino IDE did not provide, and so I wrote a post about it :) Pure and simple.
I'd say that whatever you think of eclipse, you'll have to make an exception for the question "What is a better development environment than the Arduino toolset?"
I use Eclipse. What's the problem? After the initial setup for the libraries it works great - just hit build, but with the full and normally working gcc build chain.