Quorum configuration warning for cross subnet AAG failover
I had removed the node weight of the 3rd node. Am I missing something here?


You're receiving the informational message because you've removed the possible vote (node weight of 0) of the replica. Since it won't ever have a vote, it also won't ever be able to stand on its own should any issues arise with the cluster, since this effectively removed the dynamic quorum aspect of clustering when this node owns anything.

This truly may be what you want, for example as a DR node whose availability you don't want impacting the production nodes. In that case, as long as you understand the situations you're protecting against and meeting those then I don't see a problem setting it like this (which is effectively that you know better than the cluster).