Unless I misunderstood the app while playing around with it and reading every word on your product page, it is not a _ drop-in replacement_ for those tools. Albeit, I didn't try creating my own url/launchers but if anything its functionalities seem like a subset of Alfred's abilities as opposed to a replacement.
..which was one of my primary hesitations considering this tool for adoption while playing with it. I already have Alfred, this doesn't replace Alfred, and I don't want yet another launcher to keep in mind. I could just sync all apps locally (Dropbox/Google Drive) and get the majority of the value proposition of Slapdash with Alfred.