We just got back from FW on Sat. We asked a few people what was going on with River Country and got several different answers. The most common one was that WDW spent so much money on Blizzard Beach that they want to fill that and TL as well. Staffing costs the same for each park but BB and TL have a higher fee, so more $ for WDW.
I don't buy the lake quality therory (although a boy just died in FL from a bateria that he contracted from a different lake) because they still have water skiing, jet skis, mouse boats...on the lake. If it truely was a bacteria problem, they wouldn't allow anyone in the lake.
BTW, we didn't see anyone working on renovations at RC. We also noticed that all of the traffic signs for RC are still up. It isn't until you actually get into FW that the RC sign says it's closed.
Just my thoughts!
Diane