Your argument is based on the 50%+ on average which is based on Mayday Deception. So you ruined your argument "people just don't understand how to play" "Deception in capable hands is..." But as we see from the table you only need to buy a card for 20$ to be "capable hands". Personally, despite my passion for Deception... I just hate the laughter of this flying b***h (Kamala Harris of GU), only insane people can play this archetype (sorry fans of Mayday but you are nuts).
I like Mill Deception, my own style Mill Deception, although look at this guy: https://gudecks.com/meta/player-stats?userId=3791411
He plays his own style Mill Deception in Ethereal Diamond. His (her?) deck is very smart: https://gudecks.com/decks/GU_1_2_BEbBEbBFXBFXLAGNBgNBgNBmNBmNBpNBpNCbNCbQATQATCCWCCWCCgCCgCFLCFPCFPGCKGCKIAkIAkIAnIAnICmICm?godPowers=100119&creator=Gabe_Ster%20TTV&userId=3791411&archetype=Mill%20Deception
It didn't work in Auric where I am most often (maybe I wasn't skillful since the deck is new to me as for playing). As soon as I am in Ethereal (it happens but not often), I'll try it again. Fun, a lot.
As for top decks on gudecks. My fresh story. I tried to test this and that (ToD cards) and was punished for that - de-ranked to Midnight and Twilight even. Then, I returned to my standard Mill Deception saying "never again testing!!" and guess what had happened? I skyrocketed to Auric (and failed to get into Solar). And look I am on the 3-day list, the last deck of ??? (me):
RE: GODS UNCHAINED: Deception Deck Really is a Trap, In Every Sense [EN / PT]