Hum, if you die, the extra 10-15 seconds you save getting on point with moonshine is pretty useful. Plus galleon rams on unsuspecting enemies will destroy them. A moonshine galleon ram on a spire almost oneshots it, certainly kills all the armor at the very least.
Also the claw is basically necessary or you will never shoot anything.
Sadly as an engie you'd have to pick one or the other, and as claw is vital on the majority of ships, bye bye ramming =(
Anyway to get back on topic:
I support some sort of indicator. It would actually even be more useful in lobbies, where unsuspecting crew have divulged your entire ship's strategy to the enemy team before.
I also sometimes completely forget which button goes with which action (and iirc they behave differently in lobbies too).
Another problem is party chat...I've responded to people on ship or team chat before while instead it was a party chat. There is literally no way to tell how your captain is speaking if he is also in your party.