@vasu not to have too high expectations on the “answers/help from my side”, I am not the developer of the Meraki integration. I just helped a little bit to get it working.
Since dynamic host management is entirely based on the hostname, the only way to move the host to a specific folder depends on your hostnames and regex skills. Depending on the number of your devices (and the dynamics of incoming and outgoing devices), you can move the devices to the correct folder after DCD creates them, or you can create the devices manually (or via bulk import) and not rely on DCD at all.
Another option might be [ cmdbsyncer] from @bkuhn.
You should see the meraki_org section under the host you attached the special agent to (This is basically the license section from the agent) Here you will find a rough overview. For this you do not need the HW/SW inventory. With the HW/SW Inventory enabled you will find at the Meraki devices some Meraki related informatins. This comes from the device status section.
As I do not have any Meraki sensors I can not say anything about this section. So if you can provide me with some agent samples I could have a look at them (If you like as PM).
Jep, for now the Meraki integration provides only the license status per organistation, the device status per host and some inventory data (and of course the sensors section) but not more.
Ideas yes 
needs just some time.