Gonna agree here. GW2 is good in spurts, imo - so it would never completely pull me away, but during the time when I was unsubbed from WoW I took to it as a substitute for a while. It’s nice to go back during major content updates and see what’s up, but that’s about it.
Not a “WoW killer”, but I also enjoy a ton of Warframe. Used to have an unhealthy obsession with it for a few months (and the Fortuna release has been calling me back ever since I went on my first K-drive run), and it still gnaws at my resolve to play WoW every now and then.