Hello Azm
This is a very good question. I spent some time researching and yes I did find the same best practice suggestion you mentioned. Specifically, in Cisco’s Design and Configuration Best Practices for vPCs on Nexus devices document, Cisco just recommends:
“Do not use HSRP/VRRP object tracking in a vPC domain.”
Not very helpful. They don’t mention an alternative to object tracking. However, I have found the following useful: The Peer Gateway Feature which provides peer-gateway functionality that allows a vPC switch to act as the active gateway for packets that are addressed to the router MAC address of the vPC peer. This feature enables local forwarding of such packets without the need to cross the vPC peer-link. More about the way it can be configured can be found here.
I hope this has been helpful!
Laz