Hello Vlad
This topology looks like it’s part of the implementation you described in this thread. In the diagram, it looks like you have well-designed connectivity between the Meraki switches and the Nexus switches. You have two port channels coming into the Meraki switches from two different Nexus switches which delivers redundancy.
Now I would suggest that these portchannels be Layer 3, and that the Nexus pair also perform L3 for the internal network. Although the Meraki devices are performing L3, any internal routing from subnet to subnet should not burden these edge devices, but should be routed by the Nexus pair.
You can apply HSRP to the Nexus pair to load balance traffic from your internal network. HSRP on Nexus devices (unlike IOS devices) performs automatic load distribution by default. I’m not as familiar with Meraki devices, but I’m sure there are mechanisms to help load balance across the two port channels you created to more appropriately distribute traffic.
I hope this has been helpful!
Laz