Richard, maybe but the dollar has been weak before and overcame it but this time things are different. With the weak dollar this is of course good for US exporters but only if you have the right goods to sell and that the markets are their. I see a tendency that some major economies will protect their markets from "cheap" imports from the US, to be honest they have learnt this from the US, which for years used this as a successful weapon but this could be turned against them.
I certainly beleive that the EU will for sure protect their markets, they have in the last few years shown their willingness to do it and from a ever stronger position they will do it more often.
As for the WTO they are like the UN they talk a good fight but really don't and can't do anything, they are a toothless tiger.