Thanks for that idea, I'll keep it in mind. Had not even gotten that far in a plan, since it seems important to try to keep the lines going separately. Other than killing and eating them, I had not worked out any other plan if things didn't improve with them.
There is such a limited amount of pure Java genetics that go back farther than about 20 years, so I am trying to give them time to recover after having been neglected for so long. Urch cas been carrying a lot of bird breeds for a long time due to lack of breeders, but I can see the difference it makes with having Urch at least trying to keep the birds from disappearing, and birds that were just tossed in a pen and left to their own devices for who knows how long.
I'm gonna copy your suggestions down to keep for reference going forward if things stay stalled at such a substandard level.
People get way too attached to named lines. Once the original breeder of that line stops having input on the breeder selection and culling it really isn't truly that line anymore. Chickens aren't pedigreed, best advice for the breed would be either outcross as suggested, or ditch the inferior "line" entirely and continue breeding your other line that is more in line with what you want.