So, a first report of a few matches played in the past days. I was playing the list of Danigral and my opponent was playing the Agency/Stl list I posted before in this thread (in particular, what I consider the sub-par list, with Gentleman's club and Disgruntled chief, with the Rats being the restricted. Hermetic seal was used instead of Rays of dawn to have a day card at cost 1).
Summary: Y. lost 6 games and won 2 games.
A bit more details.
Without one of the "big 3" (void, lost oracle, lost city, which are basically the fastest way to discard cards we have) I was usually taking a mulligan. I tried first to play aggressively: I am a combo deck and I want to combo as fast as possible. I have lost all these games without any chance of winning. The problem here is that if I want to pursue this approach some "protection" pieces are going to be resourced and I am missing tool to stop the board development on the other side.
Then, I changed the approach: I was trying to be a bit more "conservative" and I was trying to setup slowly while stalling the opponent to get to the "big turn" in which I can sneak in and win one or more arcane struggle. In this case I managed to win my 2 games, with a bit of luck (more details on the "luck" part later).
First of all, the games play very differently for the opponent if Y. goes first or second. If Y. goes first, the opponent is slowed down of 1-2 turns. As the agency/stl player you don't want to be behind in the board. So, if I manage to put down 1-2 chars (and knowing I am playing some tricks like pushed), the opponent doesn't commit immediately to stories to be able to defend actively the arcane struggles (this is even more true if I manage to put into the discard pile a lost oracle or a void). These are the games I won.
When the opponent starts, Y. is just behind. A normal start from the opponent is 3 chars on turn 1, or 2 chars and a support. From this moment on, it is basically impossible to do everything. If you (= the Y. player) try to combo out, you just don't succeed: there is no way to win that stupid arcane struggle. If you try to stall the board, you are just doing it in a very not efficient way. If you try to put down some chars to compete with the board (because you have faceless and other chars) again you have subpar chars. With the following turns, it is just more and more chars coming down; at some point, they can just commit leaving behind enough blockers and you cannot do anything. Yes, in the meantime the other engines are being activated, like speak to the dead, but they are way too slow.
As I said, the two wins I managed to get were dictated by Y. going first and a bit of luck.
In one case I saw in the first 25 cards all the void and all the lost oracles. I won an arcane struggle by one icon (I had committed 5 icons...) and I managed to pull off the win.
In the other case, I saw 2 keeper of the great library in 11 cards. The first was shot immediately, the second managed to stick around, win arcane and since I had also 2 voids I managed to put enough good stuff into the discard.
From these games, I got the same impression I got with other lists of Y. I was trying: the variance on the draw quality is determining a lot the performances of the deck.
About single cards: the dogs and the hounds, which are clearly there as weapons to protect stories and gain some board advantage are easy to get around. In this case, the hounds were useless (no triggered chars in the opponent deck) and the black dogs, after seeing them the first time, you just need to commit two chars together.
The removals are obviously not enough to play the "control" game, but in general against slower decks they might do the job of clearing the path to win an arcane struggle. Frozen time looks very nice...but after trying it I have the idea that it is useful only against Snow Graves or unique characters that are annoying (read: the terrible old man). Not blanking the icons is a huge minus in the card.
Of course, the sample of games played is very small at the moment. If you have noticed errors in my style of playing the deck, please let me know. Hope these reports help.
PS, EDIT: there was a tournament with 12 people in Italy last week. 3 Y. at the tournament. They went fifth, sixth and eleventh. Just to keep track of tournament appearances of the deck.