Thanks, Ceric. Found out it's actually mapped to the D-Pad Down for remote play, which is a poor choice. The game feels much better on the DS4, obviously. As a side note, I really wish Sony would implement Remote Play through their playstation app for tablets so I could use the controller/tablet and my wife could use the TV. Vita is a bit cramped for my hands, and you can't chat through the vita with PS4 people while playing.
I'm really enjoying the game so far. I get the comparisons to Borderlands, but the gunplay & controls feel better here, and honestly, I wasn't a fan of the style & humor (felt like it was trying too hard). I much prefer the asthetic of Destiny, which feels like a mix of Star Wars & Mass Effect wrapped in Halo gameplay and WOW instance structure.
I started as the Warlock, but I think I might give the other two classes a try before the beta ends to see how they all play/feel, so I can get a sense of who I'll main with.