With the discovery of a newly formed island in Luconia Breakers, I'd say the shouting and hollering will continue unabated. If anything, things will get even nastier as US inserts itself in the sovereignty disputes.
Well, as I have said, there is not really much the US can do to halt China's activities in the SCS.
The US can talk, it can try and get other nations onboard, it can go to the UN, etc., etc.
But the fact is, the reclamation is a fait accompli.
The dredging and material construction on those reefs is not something that the US can really stop at this point. The PRC has the capability and the will to do it. The PRC can put radars on each and every one of those new islands and give the world good safety and anti-piracy, etc. reasons for doing so.
Short of a total economic boycott (which is not likely because it would be a two edged sword hurting the US as much if not more), or direct military intervention (which short of the PRC doing something really stupid is not going to happen) the US is incapable of stopping that type of work. The only possible course I see is to form a international commercial consortium that helps the other claimants build tit for tat in the SCS to match the PRC. But this is unlikely because getting everyone together would be difficult, expensive, and the US currently does not have the leadership (IMHO) to pull it together.
But, this anti-piracy thing could work to EVRYONE's advantage. IMHO, if the US were going to be smart in international relations, it would be the first to propose a multi-national effort, including China, to root out and rid the area of these pirates, and then establish international patrols for the future to ensure they never come back.
In that way everyone has a legitimate, common interest reason to have their assets in the area, stopping piracy and keeping an eye on each other in a way that benefits them all...and allows their personnel to work together and establish multi-lateral relationships.