The IPCC is being reviewed by the Interacademy Council (which represents dozens of national science academies). And they're taking public comment. This might be a good chance to get some improvements. The comments form is at:
If you can't think of anything, here's what I wrote:
- The IPCC needs to report more frequently. Interim reports, or even annual updates would be very useful.
- More focus on possible tipping points.