Not sure about the particulars of this card and why I would want one. Would this be an additional card over and above Neo WE? I travel ALOT and can’t recall the last time I flew on United.
It’s great to have a backup card but I wish there’s also a VISA variant of this. 
It’s going to be another WE, so the same level as the Neo World Elite or the Cathay Pacific World Elite. I’ll try and share the deets soon, I actually haven’t dug into it too much.
Part of the value proposition is that United is part of Star Alliance — so their points work with Air Canada. You can use them to go anywhere in the world, even if you’re not directly flying with United.
Why Visa? Are there places that don’t accept Mastercard?
I can’t imagine it would be easy for us to break exclusivity with Mastercard at this point.