One other thought is that with the current configuration (vrrp clustering using overlay/tunnel network) if the tenant east-west traffic saturates the network such that vrrp health checks start to time out, this could cause unnecessary re-elections/transitions which would have the knock-on effect of adding extra load to the environment (as neutron would need to keep up with this and itself generate more load in doing so).
One other thought is that with the current configuration (vrrp clustering using overlay/tunnel network) if the tenant east-west traffic saturates the network such that vrrp health checks start to time out, this could cause unnecessary re-elections/ transitions which would have the knock-on effect of adding extra load to the environment (as neutron would need to keep up with this and itself generate more load in doing so).