How much has this game changed since release? Is there new content?

I remember playing Divison 2 on release and it was a lot of fun, but I didn't really play much post-campaign as there wasn't that much to do. With Destiny 2 having shat the bed, this game has come up as a live-service alternative, although I never really heard it talked about as such before. Is there still things being released? Is it worth playing again?