Is there any way to get the poolMemberName/nodeName from the m_interfaces.getLocalLBPool() or m_interfaces.getLocalLBPoolMember() object

I believe the display name is an attribute of the NodeAddress (IP) and not the pool member (IP:Port). You can use the LocalLB.NodeAddress.get_screen_name() method to return the display name for a given node IP. You would then use the Pool APIs to query the members of a pool, and then use those member IPs to query the screen names. In v11.2, we did introduce meta-data in the pool member object so there could be some data in there you could look at as well. I've been away from the GUI for a while so I'm not exactly sure if that will get you what you want though...