Simmering Fury - I need my Watcher to be as risk-free as possible and I don't want to chance it with this card. I guess if you had a transquility that it would be decent but ehhhh. I just don't see a need to have this in my deck.
Windmill Strike/Perseverance - Watcher is a glass cannon that blows things up very quickly. These cards would be alright on someone slower like Defect or Silent but they feel misplaced on Watcher. I had a heart kill today with Watcher where I removed Perseverance in the act 4 store because it was just clogging up my hand.
Alpha - This also feels misplaced on Watcher. When I first started playing Watcher, this + a really thin deck (~10 cards) was my go-to, and if you go that extreme, it kinda works? You still need like 15 turns to kill the heart that way, and the energy cost to get it into play is more than I'd like. Put it on Defect with a frost orb setup going and you can just click end turn and win, but that's not Watcher's style.
Like Water - Kinda nice for act 1. Adding 5/7 block in act 3 when things are hitting you for 50, not so much.
Signature Move - I used to think this card was great! If you're in divinity it can really mess things up. Watcher just has so many ways to play an endless amount of cards with stance switching and scry, and amazing cards like Talk to the Hand don't benefit from this card. I feel similarly about Reach Heaven. Signature Move is good early on but once again, as things scale up that damage isn't really what you need.