Frankly I cannot see the point of having built a huge and expensive fortress at Louisbourg and having to maintain a huge garrison of regulars that would be much more useful to the defence of Nouvelle France lined up with Montcalm's army.
Clearly, it serves no purpose, as the Royal Navy can sail right up the Saint-Laurent and land a British army under the very walls of Quebec, and without a powerful squadron of warships the large garrison of Lousibourg cannot do anything about it.
If Louisbourg was not a mandatory objective, the British player could just as well ignore it, or rather consider it to be a large self-supporting POW camp. And on top of that, it is quite easy to overpower the garrison. The British can afford to get lots of regulars slaughtered, and they take the fortress in one huge assault.
Is there anything more sensible to do than to use de La Motte's fleet to evacuate the regulars to the mainland?