Well, wether they like it or not, it's still no point against the statement of coinbase. If coinbase is not sure about BTG then this statement still won't change anything. So either they give the code free for public review or they have to live with coinbase being cautious.

On the other side, if they trust in their product, coinbase will see everything is working fine and add them later.

"We kindly request that Coinbase review their statement and edit it in a way that is based only on facts, not assumptions."

well, without public review about the code there are no facts to make a statement with ;)