One innovation is that the supply lines were stretched across the wormholes, so you had to be aware of not losing control of one, or lines break. This meant that sometimes you had to be aware of several solar systems at a time, moving warships and fuel in the rear to the front line and vice versa because the systems could have several wormholes from where the enemy could attack.
Also the planets on which you built had different characteristics such as size and composition influencing the resources could be extracted and the number of slots available for research and production buildings. So you had to plan how to build, for example, specializing a planet to build capital ships, another one for gas or mineral extraction, etc.
The fact that throughout history you could play with the 3 races added even more fun to the whole. In short, a highly recommended title and I think undeservedly forgotten.