A P60 ground-up redesign with a pill that screws into the body/head is just not going to happen. It would no longer be a P60, its parts would only fit itself, which is the opposite of the one thing a P60 is good at. Even a non-threaded pill that was a slip-fit/light press-fit would kill the P60's one party trick, as the ID & depth of the bore in the head is different between just about every single P60 host version. A pill sized to fit a L2P wouldn't fit a 501B. There are even differences to the inside of the head on different batches of the same model, because that dimension is not critical when using P60 parts.
LD-40! (17mm Buck driver, 3-16.8v!) - too tall to fit in a P60 pill, though.