I went along for a nosey today and the gates are locked (usual) so no legal access, the path is still being constructed on the wetlands section, and a long way from complete looking across from the RSPB centre with a handily provided telescope :-) The permissive permissions have not yet been granted according to the warden at RSPB centre, he was rather anti-cycle and said 'cyclists are still trying it on' even though the gates are locked, the range flags are flying, and works warnings posted! Please don't try and use it until officially open would be my reccomendation.
The road from the point to the Harp is mostly rubble having been skimmed, but the contractors are laying lots of tarmac, and I think that this section will be finished this week! I reckon another month at least to finish, not sure when the official opening is - by Easter was the plan.