Hello Szymon
If you limit a VLAN to a single access switch, then you can make the link between the two distribution switches an L3 link. You could still implement FHRP between the two distribution switches because any FHRP information exchanged between them would communicate via VLAN 10, that is, through the application layer switch itself. This enables you to keep FHRP, but it eliminates the need for STP (because there is no longer an L2 loop for VLAN 10) that would result in the blocking of one of the paths.
This means that both uplinks can be used simultaneously, making a more efficient implementation. In particular, the Nexus implementation of HSRP automatically load balances traffic in such cases, as does the VRRP and GLBP.
Does that make sense?
I hope this has been helpful!
Laz