I agree that still her lyrics are well-written...they seem so to me, well
I liked LOVE n HATE & rollin lyrics & all their arrangement, well, they are simply my 2 most fav songs
I know how much fans complain about lack of ballads & such
I guess that during her 1st half of career, age 18-23 is such a state for everyone, a state of becoming really mature

that explains deepness of the lyrics & thoughts
if we remember clearly her emotional state that time was rather low, because she was lonely, and it explains dark view on things around
her getting on top influenced too, that explains her lyrics too
now she's mature, confident, positive & has friends, so she doesn't have that emo-state
I guess so