I think it will be a mix of ARTPOP and Born This Way in the sense that.. Born This Way was an album about love and acceptance and ARTPOP was an explosion of creativity and all its colors.
So what I feel is, like Stupid Love (which is likely to set the tone of the whole album), LG6 will be a colorful, happy album that will be about spreading love & joy and being loved / being kind. (not in terms of lyrical content per se, I mean perhaps the intention of the album would be to bring more kindness, love and positivity to the world through her music)
But to answer the OP specifically, I loved how music-heavy ARTPOP was and its production but I doubt Gaga will make music like that again since she's been focusing and showcasing her vocals more lately (which is amazing as well). You can hear a lot of strong vocals in SL too especially as the song nears the end.