It will probably add a bit of flavor. It may take longer so I would say don't count it too much toward the final taste unless you plan on letting it (the uncrushed coriander) sit for some time.
What is your plan for overall fermentation? Are you going to rack to a new vessel at some point? Bottle straight away from the vessel it is in?
If you plan to rack to a new vessel wait until then, taste it. If it is too your liking don't worry. If it does not have enough add some tea at that point. If you are going to bottle (or keg) from this vessel, well, same deal. I do not recommend "dry herbing" btw. Herbs do not have the same acidic/antiseptic properties of hops and can carry some funk on them. Speaking from experience there... :cross:
