Tooooo be honest, I think Disney should just move on from this. Bring back the gators in the parades and shows, bring back the gator in the water pageant, bring back the joke in the Jungle Cruise, and learn from this tragedy. It was an awful thing to have happen, but they can't stay in this state of paranoia forever. Eventually, people will forget about what happened. Sure, there'll be some that are still afraid, but like others have said, this was the first gator attack in 44 years (not that there should be any gator attacks, but 1:16,060 days is a pretty good ratio IMHO).
Disney did a good job by putting up new signs, but hopefully they remove the fences sooner rather than later. Disney is finding a way to make sure this will never happen again, and I applaud them. Some of the things they have done (and are rumored to do) is taking it a bit too far.