Well it's a legendary consumable, I would assume it's rare enough that you won't have that many, but yeah at some point you'll just reroll the socket to something else. I guess the issue is if you find an item with a socket already so you're tempted to reroll the other stats, which would fuck the item forever even if you find a consumable. Finding items with no sockets is better cause you can reroll a stat to socket, then once you find the consumble you reroll it back to a stat then socket it with the consumable.
Still, sounds like an ok change, means there's a few more items viable when they drop. If an item has both a shit roll and no socket, it might still be valuable.
As for class changes and shit they said before PTR wouldn't have all the changes at once and that they're still iterating on stuff, iirc. The wizard changes do look pretty fucking shit in comparison though.
Also Depth Digger might make a pure hungering arrow build viable potentially. Buriza+hungering quiver(forgot the name, the one that increases pierce chance)+the increase damage rune+this... There's also the set of rings that increases builder damage by 50%, not sure it's worth losing grandeur though but might depend on how it stacks. Could get some pretty good builder damage though, then everything else would be cooldowns and shit to clear trash.