I'll make a few short comments and then pass it over to Blair.
I am aware of some of the studies that have been done into glyphosate. From the research I've done into it and my personal experience, the two major factors are varieties and climate. If you have a combination of adverse climate conditions, excessive moisture, lots of humidity, combined with a susceptible variety and, perhaps, an area that has had issues in the past, that's where you'll find your greatest problem.
Where I see the biggest gains going forward, and from all the research I've read into it too--I don't have anybody to quote right here--finding varieties that are resistant to it is probably the solution.
I'll hand it over to Blair.