NASA wants to shit-can it because of money issues. They want to turn it into a heliosphere probe, which NASA doesn’t need; it just gives them an excuse to mothball it.
A shit ton of planetary scientists have been complaining and word got out, upsetting us space nerds everywhere. NASA doesn’t want to send another probe out to the Kuiper Belt for another 20-30 years, as in we millennials will be old or dead by the time we get new Pluto pics if they get their way.