I have an away team. Who have ground based combat skills; but nothing related to ships.
And on the ship's "bridge" I have a chief engineer assigned to my ship's engineer station (which is usually in the engineering section of the ship; though can be rerouted to the bridge); a science officer; and a tactical officer. Some of those have ground skills.
At Admiral rank you have 10 slots of bridge officers; thats more than enough to have a double crew. You want MORE? From what I saw about your bonus idea; it seems to be stepping on the ship consoles territory (the inventory items; not the slots where you place the officers)
I'm not saying we need more total. The 10 slots at admiral are probably plenty. I'm talking about more assignment slots on the ship, besides just the bridge consoles. Yes, it does step on the ship console territory some, and maybe that alone is a good enough reason to not do it. But I think it would be an interesting endeavor to try to acquire such rarely skilled individuals. It could even be an experienced based thing. The more time an officer has in a certain post, the higher his passive bonus becomes.
I also think, as I said before, it would be a great emmersion aspect that could be added to the game. And again, my idea had nothing to do with away teams, just aboard ship.