Penflinger wording doesn't make sense but it is a good nerf suggestion.
By the way there is a common error in all people's suggestions which is "not trying to kill the cards" But why? there are tons of useless cards out there and there are more that doesn't see play because of powercreep cards. What makes those powercreep cards special?
Yes, it should be about not killing (healthy) archetypes, and not cards.
Deck of Lunacy isn't about power creep, it wasn't a problem before in any format for well known reasons.
Deck of Lunacy is one of those cards that people can't deal with. And with Incanter's Flow and a bunch of draw spells? It's pretty much over. They are spamming these big spells that's reduced by 3 mana than their original cost, but that's only if they're playable. Granted, there are some spells that aren't playable in a no minion deck, so there's a pretty big RNG factor as far as what spells you end up getting. 75% of the spells you get randomly, are playable I'd say. For them to be reduced any further is where the problem is, I've seen someone play a 1 mana sprint before, it's extremely tilting. Not only Lunacy, but incanter's flow is a problem as well. I think if they up'd it to 4-mana OR change to text to reduce spells in your "hand" by (1), itd be fair.