It's early days but I've got to say it: people don't really like playing this deck at the moment.
Since unlocking it, I've been queueing games in unranked and playing Lexi each time to give myself practice with it and to allow players who've not unlocked it a chance to try the deck without risking rank.
The card movements on Donate are really stretching turn times, regularly hitting the hourglass countdown from midgame onwards.
Confine is a total fun killer, as suspected. Once two or three of your high-value cards have been taken, players are not really motivated to play seriously. I had one player yesterday who to his credit kept playing but had hit endgame with nothing but treasury cards and bewilderments left in his deck.
Maybe everyone gets used to it. Maybe everyone agrees it's a nofun deck and just chooses not to select it (as they did with orgnum for a long time). Maybe it needs reworking to retain the basic idea but limit its potential to ruin all the fun in a game.
I'd suggest every confine card having a confine ranking so that they can only hold X amount of cards, and all having their hit points reduced.
I played against an expert NPC a couple of days ago. They chose Almalexia as one of the patrons. As I didn't know this deck and had no idea what it is doing, I always bought the cards, when I had the chance, just to see how it works.
The game ended with me winning and the NPC not having a single card on their hands for the last several turns.