opponents' hand information in an uninteractive format full of solitaire decks is pretty much useless beside few rares matchups, even then, you will still have too few ways to interact with what you see. Just play optimally, try to open yourself to risks the least possible, and information wont matter.
Don't get me wrong i'm the first being sad of this state of affairs, but all day long i'll prefer a scry 1 to a peek effect. It's the least interesting thing a cantrip could give you. Hell, almost every single cantrip legal in modern have way more interesting effects (Niveous Wisps, Bandage, Defiant Strike, Thought Scour, Slip Through Space, Cerulean Wisps, Twisted Image, Quicken, Nighthaze, Cremate, Aphotic Wisps, Needle Drop, Crimson Wisps to name a few).