No thanks.
A red spar near me has three different gelcoat colors on it already this season and, if things proceed "normally", there will be seven or eight different colors on it by October. Nobody's struck the neighboring black spar yet.
If Japan can built a jetport runway into 60-feet of ocean, New Hampshire can reclaim part of The Witches for recreation.
A new Winnipesaukee island won't assure that a soused boater can't run aground (e.g., June's Eagle Island adventure), but would fix two problems: visibility and recreation.