There are few attributes which are deprecated in model but they should still be configurable in EAP 7.1. They are going to be replaced by Elytron in future, but for now they have to be kept in Web Console.

Namely it is:

• HTTPS Listener /subsystem=undertow/server=default-server/https-listener=*
  • SSL session cache size
  • SSL session timeout
• mod_cluster Undertow filter /subsystem=undertow/configuration=filter/mod-cluster=*
  • Security realm

Maybe there is more of them, but for now, I know only about these.