It looks more like a workaround than a strategy.
As @freebroccolo says in the page you mentioned Support for connected rtop session. #43
a REPL integration will never work well without support from the build system or quite a bit of manual intervention from the user (load the right packages via topfind/Findlib).
Maybe the Dune team could give us their opinion about that?
There is an article about a projected OCaml IDE at JS but focused on github integration [https://blog.janestreet.com/putting-the-i-back-in-ide-towards-a-github-explorer/](http://Putting the I back in IDE: Towards a Github Explorer).
There is typerex that claims to be an OCaml programming studio but this is a set of (used) tools and not an IDE as suggested by the word studio.
I had a try a few years ago with the now old OcaIDE plugin for Eclipse that was interesting. It has module and members completion, code outline, type pop-ups, information pop-ups, hyperlinks, help on expected parameters, files tree, errors markers in the editor and in the files tree/explorer, module browser and integrated toplevel.