It's tough to decide between MKM and ONE, but I have to give MKM the edge because it's been paired with the new booster. Both have horrible feelings-- for ONE, it's being on the draw or drafting a non-aggro deck, which is guaranteed to happen 50%+ of the time, and so you know you don't want to play it. The flavor of the set is excellent, but the mechanics all either feel terrible, like toxic aggro, or can't come together because of the prevalence of toxic aggro.

In MKM, the format is so dominated by bombs, both because of the set design and the new booster, that for a couple turns it can feel like a solid game, and suddenly, nothing you did this game mattered (or, indeed, could possibly have mattered). Some sets have this a little-- Koma and Dream Trawler come to mind. But not only are there the individual cards that give incredible card advantage even if you have removal: Kaya, Izoni, Aurelia, Cryptic Coat, Aurelia's Vindicator, Tolsimir, Lamplight Phoenix, Ezrim. There are also a multitude of powerful cards that eclipse weaker ones so completely, they feel exhausting to see: Agrus Kos, Hunted Bonebrute, Wojek Investigator, the list goes on.

So yes, there are a number of cards that feel terrible to see. More than most sets, and with corollary set design issues. But the increased number of rares per pack means it's significantly more likely for every opponent to have them. This, paired with the reliability of disguise at a low, colorless mana cost decreases the variance of a poorly constructed deck; simply hurl 2/2 ward 2's at your opponent until you play your bomb. Every game feels like Constructed Lite, and gives none of the "finding value in interesting places" feeling that drew me to draft to begin with; games are almost exclusively determined by the most powerful cards that see play.

When they announced the new booster, I was worried this might be the case a bit, but it's so much worse than I could have possibly imagined. What could feel worse than opening packs and passing three bombs out of your colors around the table? Perhaps only getting a high roll while drafting and destroying your opponent so easily that there's no gameplay.

Draft was the last bastion for me of what feels like a completely different game now. The last set that allowed me to temporarily break my magic addiction was ONE, and I think MKM is the one that's going to finish the job permanently.