I would have to say that both conferences overreacted. What Jurchen proposed is not evolution or theistic evolution in any way (although at my first reading I thought it was.) There is nothing in his article about creation that is anti-biblical, although I think his statements about the flood stretched interpretation way too far.
And, no, the synod never established an official position on the age of the earth.
However, his old-age creationism doesn't work well and really is not a solution to the problem. The old earth creationist has to figure out where to put the gaps in history and cosmology into the biblical account. Because the sun, moon and stars are not created until the 4th day, this presents a problem. You can't put billions of years prior to the 4th day. It is too much time to put into any of the following days, between the creation of sea life and animals, for instance, or into the sixth day between the creation of animals and man. And between Adam and the rest of the history of Genesis doesn't allow enough of a gap either. The old earth creationist has to do more than just stick time into the gaps. Somehow, he has to move the creation of stars and sun to an earlier time of creation and at that point you begin to break the text.
For that reason, I don't think there are a lot of old earth creationist around and those that I have read really don't seem to have a very full or specific model of creation, unless things have changed recently. It usually comes down to saying "well, somewhere in there is some extra time but we don't know where or how.
So, while Jurchen's solution is not heretical, neither is it a very satisfying or workable one.