An 'optional' single-player GUI should be an option when hosting a session (as kind of realism setting).
Maybe only accessible by the guy who make the host(= as Skipper).
But these 'Shortcuts' should not cover all that stuff we are used by former titles , like
* reading the Map or plotting a course, while standing @ BFT9 in the coning tower in the north atlantic sea
* etc...
Just basic crew instructions like (full)port, (full)starboard,'full ahead'... also transmit observation to the TDC...
The balance should always reward multicrew-ships against single-player
-Feldpost