It’s still worth noting that, compared with most other religions, JWs are doing pretty well.
Take Britain for example where JWs are still managing to grow a little. This is pretty remarkable in a broader religious perspective when you consider that practically every other denomination is in decline: Anglicans, Church of Scotland, Catholics, Methodists, Mormons, Salvation Army, Brethren, Baptists, Christadelphians, Unitarians. Many denominations are in freefall, having lost 2% or more every singe year for decades. Some are talking about folding their churches as a whole within the next few decades. (The only churches that are growing in Britain are churches that comprise immigrants who have newly arrived from other countries.)
In that context the fact that JWs have managed to grow at all in the last few years is pretty amazing. How much longer can they defy the gravity of general religious decline? On top of general religious decline, they have many internal problems. Who can say what the future holds, but my best guess has to be that they cannot defy gravity much longer. And the signs of decline are already beginning to appear: declining congregation numbers, relying on immigrant groups for growth, cutbacks and branch downscaled, general rhetoric of decline.