I would really like to see the Off-Duty customization slot have the communicator pin available.
The 7 of 9 bodysuit being set to the Uniform slot brought this home for me.
In Voyager, Seven carried no rank. Only for tracking and communication purposes, she had to wear a communicator pin.
This also caused me to look more closely at Counselor Troi. She wore at least 3 casual wear options while serving aboard the Enterprise-D. She wore no rank pips on these at all. Only for tracking and communication, had to wear a communicator pin. And she was able to casually wear any of these to the Bridge for 5 years.
BTW, I really don't think her (Troi) clothes options should be assigned to the Uniform slot when they come to STO.
Every non-Starfleet member of the Enterprise-D had to wear a communicator pin. For communication and tracking by the starhip's computer.
By working the communicator pin into the Off-Duty customization, this would allow these new clothing options to be far more flexible.