Delacroix Duck Mecca to Duck Graveyard

I have had a lease is Delacroix since 1994 and it has gone from decent to spectacular, to weak, to graveyard now. I really cannot put a logical reason together as to why it so void of ducks now? Granted; I am aware of obvious changes like severe habitat loss but it still doesn't add up to me. Guys are still doing well in Caernarvon and North of Lake Lery. With ducks in that close proximity; I would like think we would enjoy at least some spillover birds. that has not been the case. And everyone I have spoken to says the same thing: 1 or 2 teal and maybe an occasional Dogris. In the early 2000's we used to hammer the greys and widgeon, and plenty Motts. After Katrina "opened" things up a good bit and the freshwater diversion basically changed the marsh grasses to fresh, we hammered the teal. Most recently, we had plenty teal from 2015-2018 when I was near a marsh restoration project. Since then has been horrible. Last years opener was DNF hunt; unheard of. I didn't even go on the opener this season; but my son hunted the second day and got 2 Dogris between 3 guys. Does anyone have any opinion on why it is virtually void of ducks now? (I am fully aware this is supposed to be a "down" year; but c'mon).