From the ffxiv subreddit discord:
oroginal:
http://ff14net.2chblog.jp/archives/57680177.html
credit to iluna minori who posted it in discord.
■無人島開拓について
Regarding Island Sanctuary
・今回は“スローライフ”がコンセプトなので他人と競い合うみたいなことは極力なくすようにしている
The concept behind the content is to provide players with a more "slow life" (relaxing) feel so they are making sure any elements of competing with other players is avoided
・他人との交流はゼロではないが、基本は1人でやっていくコンテンツ
You will still retain some form of communication with other players, but the content itself is largely solo
・貿易も自分が開拓した無人島の中で、特産物を植えたり育てたものをゲーム内のシステム内の流注と対話をしてギルを稼いでいく遊び
Trading within Island Sanctuary and earning gil can be done by planting and growing specialities that you have cultivated, as well as interacting with the features in this game.
・貿易は興味がないから育てるだけで楽しいという遊び方でも損はしない作り
They will make it so that even if you're not interested in trading but only want to do it just to grow crops, or specialities can also do so without facing through any loss/penalties.
・お気に入りのミニオンをめでたり連れてきた動物を育てるだけでもいい
You are free to admire the minions you love and brought into, or just have fun growing animals you brought into Island Sanctuary.