Former Washington Post writer Paul Blustein argues the following in Foreign Policy:
Completing a reasonably ambitious Doha round would be a good start -- but only a start. Instead of pursuing more bilateral and regional deals, the world's governments should embark on new, ambitious talks under WTO auspices. Discussions on currency manipulation, the food crisis, and protectionist subsidies should route through Geneva. And WTO members should further improve the organization by making tribunal decisions retroactive.
I agree that discussions on currency manipulation and subsidies would be useful, although I don't have great confidence that any agreement would be reached. With regard to making decisions retroactive, I am sympathetic to the arguments for it, but that might be more power in an international organization than most people would accept.