The WTO website has an interesting booklet on what the WTO can do. It is called "10 Things the WTO Can do". And the 10 Things are:
The increasing number of disputes brought to the WTO does not reflect increasing tension in the world. Rather, it reflects the closer economic ties throughout the world, the WTO’s expanding membership and the fact that countries have faith in the system to solve their differences.
It also highlighted the active role played by developing countries play in the dispute settlement mechanism. These graphics indicate the level of participation: