@LienRag, @Grautvornix, only my opinion....
It would be nice if ship garrison information wasn't displayed in the interface. It would add an element of surprise...
You attack a ship and want to board it, thinking it's "empty," but it's garrisoned (even more than yours), and everything goes wrong...
The garrison is hidden below deck. It's invisible. And suddenly, during a boarding battle, it turns out it's there...
Isn't that wonderful? And it's quite historical.
But if they do decide to add information about the ship's troops, they could at least add a flag above the vessel (a simple small flag or something larger with civilization symbols) indicating the presence of a garrison. But in my opinion, that's not as interesting. The element of surprise would be lost.