These transactions do not get confirmed as fast as the transactions that you send from coinbase if they were indeed 2x less the fees paid. Coinbase uses whatever fee feed they use that is suitable for the current time. And you cannot change that.
The transactions that you've seen are probably going to be stuck pending for hours or sometimes even days, as a matter of fact.
If smaller amount then you need to use other altcoins for urgent needs.
I don't use coinbase account but using XAPO account. In XAPO they allow sending another XAPO account without any fee. If that works same in coinbase then you can request any other member on this forum can help you on this matter with smaller fee amount.
Good luck to you...
That was what i've suggested as well. If he really wants to avoid this fee then go ahead and send the bitcoins to another coinbase user, that way he can avoid it completely. However, it is definitely not guaranteed that someone would be interested in receiving funds into their coinbase account.