Sumlit
San Claudio Bravo
No its not at all.
The top clubs generally look to negotiate with their top players within two years of their contract expiring. He will have more years ahead of him and be able to get a better deal or his next contract with a shorter contract.
The contract till 2018 suits him more than club.
That's assuming he'd get a favorable extension once his renewal option came up as you assume would come in 2016. That is also assuming he'd get more than 1 year extension.
Money guaranteed in hand is always better.