CPs are effectively a Domination mode already for anyone focusing on them.
I had an idea about this, instead of it being it's own game mode, it would be added to the game as is, and it would be part of the meta-game on the stat site.
Basically, there would be three control points on every map, if at the end of the round all three are held by one team then that team would control that map in the meta-game. And in the next game cycle that team would be the defending team. If that team also wins the round everyone on the team would get a xp bonus. That would allow them to change the objectives weekly depending on who controlled the map and would add another huge dynamic to the game. It would also be more engaging for people and be truly revolutionary as the game claims it is.
Taking Wyatt's idea one step further and saying that the team who have the longest average time controlling both CPs through their matches for the week takes control of the area would be nice though. So if your team's attacking, you might see players focusing on capturing and holding the CPs so next week they're on Defense...
Would make for some epic metagame right there.
I'm 100% certain this won't be implemented in Brink, but keep it visible for SD to potentially use in a sequel?