I just don't trust anything being promoted by a small specialty company staying around for any length of time. We rifle looneys are a fickle bunch, and there are plenty of examples out there of "The next big thing" that failed to stick around. Also plenty of examples of guys getting geared up for something specialized that didn't last, for example Wildcat bullets.
The positive side of this is that since Hornady was able to build this brass during the current shortage, hopefully they'll continue to be persuaded during less difficult times.
I would personally go 6-22-250 simply because I have a metric crap ton of 22-250 brass on hand, not because I am worried about 6 Creedmoor brass. Like you said, it's easy enough to neck down from the 6.5, or via fireforming.
