It should be ‘fairly easy’ to curate a set of popular OCaml libraries in an Opam package for people who want a ‘batteries-included’ library like Go’s. It would just be a meta-package. As such, the ‘only’ work required would be testing that its dependencies work together, and keeping it up-to-date.
It can be just a standard package on Opam. No need to distribute with OCaml.