Hi,
I'd keep it and try to get more buds to grow. You may get a bud that makes variegated leaves later on.
It is known that you must encourage JT to make stems with variegated leaves.
In the future, if you get variegated leaves, you'll be cutting the stems with green-solid leaves.
I'd try it for 3 years at least.
JT is not known for having good tasting fruits; It is grown for its leaves.