I'm not sure I would look for a lot. If we had our druthers and our preferences....
It's sort of difficult to picture, because you'd have to bring a lot of people around the table to do it again and give up things or provide access that they didn't before.
The time period over which tariff rates are phased down, say in Japan, is very long. It's very incremental, and this applies in some relatively protected sectors in other countries. If we were going to do something, it would be to push for faster reductions. However, of course, the paces of tariff reduction in those countries were agreed to exactly because that was where they were drawing their bottom line.
Reopening doesn't look like a whole lot of fun, and whether we can picture such a scenario in the medium term really depends on what happens in the U.S. and the approach that a future U.S. president will take, because without the U.S. at the table, the agreement pretty much loses its steam.