If the lake is going to be down for an very long time, say 7 to 10 yrs, first the lake level needs to be determined and if it needs to go down futher then do it now so people can go in and put cover etc, after a couple of years there will be a lot of new growth naturally, the lake could become a good bass lake for a while, but some of the strypers and trout could suffer. They just need to decide and get it done, take it to a no fail safe level and fix the sucker for once and for all.