Just wanted to update folks, I've changed my commandline to
Kept the basic info so you can check if it's up or not.
Which actually shows up on the server list and is queryable by TCadmin for slots.
You'll also see the current version in the server name on TCAdmin like Feral-Frontier - (v187.2) and whether it is passworded or not.
Everything else seems mostly gibberish like the version number or protocol on the query page.
Here is the commandline as setup in template:
I'm not sure how the RCON works for this game yet, must be an Unreal Engine 4 protocol or some sort. Let me know if you figure it out.