Basic LoadBalancer Upgrade - no outbound rule created

Question

The AzureBasicLoadBalancerUpgrade module used for upgrading load balancer from basic to standard sku. It doesn't seem to create outbound rule when there's no existing backend pool in the basic LB. It can create the outbound rule if there is pre-existing backendpool in the basic lb.

I know the outbound connection is implicit in the basic LB and I want to maintain the outbound connection after upgrading to standard sku. So my question is whether it's ok to create a backendpool for the standard LB using all the nics from inbound NAT rule then create a outbound rule based on the new backend pool? Is there's any security concern by doing this way?