I have always tried to build DomWars to play to the strengths of the SFC3 game. Examples, the Refit System, I re-built it from scratch to give the player even more choice. In battle, you do far less micro-management in SFC3, it's all about your ability to pilot that ship. The slow pace of SFC2 is just not suitable for SFC3, you do not want your player sitting their waiting for his ship to turn around to fire it's next weapon. In SFC2, that's fine, as you need the time to do your micro-management, the slower pace makes sense. But in SFC3, it just frustrates the player. So I upped the speed and maneouvrability of the ships. In turn making it easier to avoid weapons, which improves the tactical aspect of the game. At the slow pace, you can't avoid weapons anywhere near as easily, you can't get that sudden change in AV.
The lack of fleeting in SFC3 can be attributed to the fact that missions are single player. I did finally find a way to do Fleet Missions though, which have proven quite popular. I just have to fix the damn bugs (well, I'm not exactly doing what the game intended am I?)
I have to start learning OP myself (finally got a copy), as I intend to convert my upcoming mod "Project Timelines" to SFC OP after it's written for SFC3.