I got my first Bareknuckles in 2004 and I have tried pretty much every pickup since. Because of my playing style I tend to prefer the Alnico magnets to the ceramics. The first holydivers I heard were in a left handed Feline Lion at LGS in 2005, and I didn't like them, but I have a new voiced Holydiver that I love. Tim has revoiced some pickups through the years, but all the changes have been for the better, as he heard them through different amps and in different guitars.
I probably have around 40 sets of BK's, some are not in guitars at the moment, I have changed some around too, but what I can say is that the newest pickups sound just as great as the old pickups. I might be one of the few people who has been to the BK workshop and to Tim's house. He has also been to my house here in the States. Earlier this year I was there to pick up some pickups and to order some more. I'd also taken an old JBJ Seymour Duncan for repair. Tim checked it and realised it needed a coil rewound, and did it for me that afternoon.
Over a couple of beers that night we were discussing pickups (as you do tend to do with Tim!), and different sounds and I have to say that he is as enthusiastic now as he was when I first spoke with him. He might not make all the pickups, but the guys who make the rest were all taught by Tim and he still checks things out that they do all the time. He also still winds a lot of pickups (I also know this because they had a large order they were making and Tim was doing about half the pickups).
I can definitely say that the pickups now are just as good as the old ones. Also Tim only made some of the pickups from the start. The other original winder is still with the company.