Good to hear it is cycled. It may or may not increase diversity because we have no idea what is in the product. Just by introducing new coral and/or fish to the tank would be an effective way to increase microbial diversity.
There are several ways the bacteria could be dormant but I am not convinced because they ar suspended in water and not refrigerated. Usually, bacteria need to be lyophilized (freeze dried) and kept dry to stay dormant. Like I said, I might get my hands on this product and do some investigating of their claims and take a close look at some of the claimed microbes that are in it.