well after heaving nearly all avatars for the "old races" completed the dominion is now under heavy development. Therefore i can't state many new features, cause i'm not sure if they will make it through the testing phase

But a few are already fixed:
Cloning
The Dominion has a relatively low crew rate (the dominion can't recrute new personal that easy). But they can clone additional Jem'Hadar warriors at their Cloning Facility (which is their starbase) for resources. Advantage: They do not have to wait for their crew to regenerate, they can just copy and paste eneough warriors

disadvantage: it costs resources.
Credits (Perimeter, Interspace Artillery)
The Dominion can spend their credits on two things. They can construct a Perimeter, which is a very heavy defence platform (can already be seen on some screenshots in the ingame-section of the gallery). Their second option will be the Interspace Artillery. Once build to bring destruction to the Alpha Quadrant this giant vessel never made i through the wormwhole before it's collapse (being kind of slow, eh?). It is capable of initiating a long range bombardment with phased polaron particles which causes heavy damage to an area of space.
That's all i have in mind now