After playing PvP the whole week, I can definitely say that I don't like it.
Rift is mostly a shitshow, where everyone camps the Spark to get points, while you almost get no points for killing the runner.
Give mayhem a go, its quite a lot of fun as long as you relax and concede you will die from a golden gun every few seconds. Totally different to the usual.
Rift for me is like Iron Banner, crap with randoms.
Mayhem has been the most fun for me as a defender, running weapons of light, LDR, armamentarium and suppressor grenades. Soooo gooood.