The Commonwealth of Nations is an insulting reminder of Britain's colonial past. The only thing these nations have in common is that Britain exploited their resources for hundreds of years. They should join other trade organizations that do not have such a fraught colonial past. Britain should dissolve the Commonwealth of Nations.
The breakdown of the British Empire supported self governance of the colonies via the Common Wealth of Nations. It does the opposite of the statement "does the common wealth of nations promote an inappropriate colonial legacy?" Further, who gets to define what is appropriate. I believe more people would be concerned about their future well being rather than a colonial legacy.