Agreed that in the long run a couple of years is not going to make much difference...except you will see other nations use that time to buid in response themselves ie. South Korea and Japan among others.2015, 2017, does not matter for a nation that's been around for 5000 years and looking at the long run. The important thing is that they apparently have made a decision.
Not much being said about it...but, IMHO, in the region there is a significant naval modernization and even naval arms race underway in this regard.