Production woes aside, the one thing that baffles me with the Browning/Winchester launch is they're NOT using the same twists between manufacturers. Winchester is settling on the SAAMI listing of 1:8", and Browning, doing what they've been doing the last few years in reference to twist rates, are using a 1:7.5". As a bullet manufacturer, that is a bit frustrating when considering the fast twist .277" bullets and what to optimize for. All in all, disregarding other available options, from a clean sheet, the 6.8 Western is a nicely balanced cartridge. I think of it as the modern day 7mm Rem Mag. For the folks that want long, sleek bullets to shoot out to longer ranges, but are relegated to factory loads only, it really does make sense, and provides a little more diameter than the 6.5 PRC for those that prefer it.
As to the original question, has it been abandoned? I don't think so. If anything, all the fast twist 270 WSMs out there in custom form will actually HELP the 6.8 Western survive. It will also help to tip us, at Apex, over the edge in releasing fast twist (or twists - thanks Win/Brwng) bullets in .277".