I remember as a young dub, being told by others and particularly from the platform that Apathy was the number one enemy and in many ways i think that's true today. People are seeing a change from the 70's - 80's (the last time the end 'felt' close to many) and now the witnesses are in a rut. The society seem to have backed off from making bold claims and instead seem to be trying their best to retain the members they have as opposed to trying to gain attention of others as they did in the formative years of the religion when they wore sandwich boards - throw in the growing spotlight on child abuse issues and you've got yourself a religion that's trapped in a purgatory of sorts - the majority of long time members will stay in the religion and die in the religion but as time goes on i think are clearly losing interest and the 'fiery passion' that used to be so obvious before and outsiders just arent interested as there are better, more interesting things to do.
This religion won't die in a huge fiery blaze of glory, but i'm almost 100% certain that it will fade out into nothingness other the next 100 years (30 years?) as it becomes less profitable and loses it's members to old age and lack of interest