So I realized today that I actually put myself in a position where I should get as many GvG packs as I can, even though I imagine I'll mostly be playing Standard. How did I get here you ask? Well...
1. I like shiny gold cards. When I get gold cards I don't disenchant them immediately for dust like a lot of people. I want to play with and use the gold versions of cards.
2. Prior to standard, because I kept my gold cards, I figured my non-gold versions were redundant. So anytime I grabbed a gold card, I would disenchant a non-gold version. this gave me more effective dust without affecting my decks since i played with the gold versions when I could anyway.
3. After the announcement of standard, I figured that since any cards moved to wild weren't worth as much anymore, it probably didn't make as much sense to keep my gold cards since I wouldn't get near as much "value" out of them anymore. So I decided that once wild comes out, I should disenchant all of my gold Naxx/GvG cards as long as I didn't get rid of the cards entirely. I still want them for tavern brawls and the occasional wild game.
So that's when I realized today, that if I opened GvG packs and got the non-gold versions of cards that I already had golds of (and had disenchanted the non-golds), it was effectively the same as opening a gold version of the same card. Which means that my GvG packs suddenly had a much larger average dust value than they would have otherwise. And while in the short term this keeps me from building my Old Gods collection more quickly by spending my gold on GvG packs instead of hoarding it, in the long term it'll make more sense once I move into the phase where Old God packs start giving me a bunch of 40-dusters.
Hearthstone has a weird economy sometimes, lol.