Would like to ask:

Im planning to get Mikrotik CRS305-1G-4S+IN for my NAS and PC 10g upgrade.
The question here my backbone connection to the router is a mesh.

       ISP
    | 
  Router 
    |

(( 5ghz connection ))

        |
Mesh Router
    |
Mikrotik CRS305-1G-4S+IN
  via gigabit RJ45
        |
    |- NAS via sfp+
    |- PC via sfp+

Would that defeat the purpose of getting 10g networking? Does this setup worth it?