Well besides the road being washed out due to the damn break, you can pretty much forget about all the hiking trails, which will be seas of mud or dangerously unpassable. The golf courses are probably waterlogged and unplayable. The beaches might dry out, but given there are so many other things to do on Kauai that are directly affected by the residual from these rains, I think any vacations there for the next 2-4 weeks are going to be affected in one way or another.
I think the priority should be on hoping the local residents can get their infrastructure fixed and their lives back to normal. As a survivor of too many hurricanes, I can honestly say I know what it feels like...and it don't feel too good