The entire thing has been rewritten, shifted to omniscient POV, which streamlined a great deal of a massive story with a huge cast. Back in the early nineties we'd had a great deal of trouble with the enforced time jerkiness of distant third, which was de rigueur at that time.
Since that time we've both learned a lot about writing, about the exigencies of political maneuvering, and there has been a lot more understood about the science and the tech, which Dave brought in. Dave did some twiddling on one battle, otherwise that aspect was still pretty tight, only the prose needed corresponding tightening.
Mostly, it was tremendous fun to be back in that world!