balance-wise, it could be good to let boarding ships fulfill a role almost identical to ram ships, but for civs that don't have ram ships (that way we don't have to be historically inaccuracy of giving ram ships to the gauls for example).
Then we could add fire ships to civs that lack those to properly build out the balance system for water.
It was that the team bonus is utter shite and researching the specific tec is a 1k waste of res. (Did you search for my post with the forum search? That's useless.)
I remember you ranting on that before, but I cannot find your post (I guess it was just a screenshot, no word 'Silk Road'). Was it, that the Team Bonus should have another name than the Civilization Bonus?