I personally think Tesla should just make the CCS port standard on all Model 3's not just the EU versions.
More options is always a good thing and surely it would simplify the production line a bit? Someone tweet Elon.
It wouldn't simplify production at all, you still have three different ports that you have to install. NA uses a Type 1 CCS port, EU uses a Type 2 CCS port, and China uses GB/T ports.
Would you really chose to have a Type 1 CCS inlet put on your Model 3 if it meant that you couldn't use any of the North American Destination or Superchargers? (Since you couldn't plug them into your car unless Tesla went through and put double connectors on all of them, or supplied you with an adapter that doesn't currently exist.)