From what I heard, they have plans to build the jetty on the other side of the river mouth. However, there seems to be some local political issues going on with that. Sudhan might have the latest information on this matter which I think he can share with us.
Building a jetty on the other side will confine the river mouth to one place. Not that there won't be good fishing without the other jetty, but the other jetty might make it better. At some point in a year the river mouth will through one of the jetty's rocks forming a deeper but narrow channel that should congregate all the action to a smaller area. However, with the fishing pressure in that spot I don't know how this would be of any help. let's wait and see....
When are you planning to visit that place?
If it is after a few months, you might have to check on what's going at that time in that place....