I think her sound needs a complete rehaul, and she needs to commit to going fully organic or bringing out the blockbuster hits. At her core, she's still a decent songwriter and much more talented on that level than other girls still in the music business and I don't see why she shouldn't continue on with music.
Her last two efforts just haven't been up to scratch. Her last album, in particular, was better when it played up its alternative side with Hello Heartache & Give You What You Like, in stark contrast to Hello Kitty, HTNGU and Let Me Go.