Why are the new prefixes crafting-only?
Add to that the absurdly low drop rate and/or high trading post prices for the components, and, well… Guess I’ll save my in game gold for something else, because playing WvW doesn’t add a lot to my account wallet and I don’t want to go broke making another set of armor. I feel your pain, and I’ve maxed all crafting professions.
While it’s not a real solution, you get awarded one Viper’s armor box near the end of the HoT personal story, so you could make a full set if you run six characters through it.
That aside, the reason the new prefixes are account bound on acquire is likely because ANet doesn’t want non-HoT players to have access to HoT gear and skins, but they didn’t add a way to do an expansion check for gear (like the check they do when non-HoT players try to use Guild Hall services).
The reason for all those soulbound items is that Anet tries to force more players into those horrible HoT maps. They understand how badly these maps failed so they implemented all kind of systems to make sure players HAVE to go there, instead of making sure players WANT to go there.
Essentially, it’s just pay to win.
~ There is no balance team. ~