Hello, not sure if it’s voluntary or not but orphea is not available despite me having purchased a blizzcon virtual ticket.
This is not a bug. Orphea will be available for free to Blizzcon ticket holders once she is released on the Live server, but she won’t be free on PTR.
Please see:
https://news.blizzard.com/en-us/heroes-of-the-storm/22556627/unlock-orphea-with-the-blizzcon-virtual-ticket
NOTE: Orphea will not unlock for players on the PTR, but will be available when this update hits the live game servers.