Its entirely possible that Smirking Spelljacker exists in a space where its too replaceable for Vintage Cube and too obnoxious for lower power levels, but its definitely an option to explore if you like big swings in games on cards with solid average use cases
You can look at the top card of your library anytime, and if its something you want to cast, just sacrifice a nonland permanent and pay the top cards mana cost
But, for a budget deck that relies on the Detective class, you might just as well keep them
Otherwise, Vial Smasher the Fierce is oddly appealing, which is strange for me to say because I'm not usually a fan of aggressive commanders
I dont want it to become a staple of any sort, despite loving what it does
Of this already small cross-section, only a few are really any good in the role