I tried it out a few times for a spin, the existing customizable features are pretty nice but if really wants to be a Opera 2.0 electric boogaloo, it need all that internet suite stuff Opera had, like a email client, irc and a torrent client.
Those things were great in Opera, but kinda bloated in the memory usage, if they found out a way to have all of that in a resource efficient matter, i would switch to Vivaldi in an heartbeat!