Lol the country industry wants 100% of Her attention, or none of it. There is no in between for them. Never has been.
Paine being of country music origin could be significant, or it could not be. It's possible that she'll come in handy with getting Taylor's country singles recognized or securing nominations for Taylor's pop music (
). It's also possible that she was a good fit for Taylor and that Paine is willing to detach herself from the country scene, if necessary, in order to work with Her.
Or it could mean that Taylor has been lying about going pop and is in fact going to serve super-country galore on the next album. That would be a bad move considering She's led everyone to anticipate pop music.