In OJS 2 authors were able to complete their submissions with additional files. Only the editor could change the main manuscript.
Now, with OJS 3, authors who submit cannot make any more changes to their submission.
As in other article submission systems, OJS should make it possible for the authors to complete/amend their submission when it is incomplete or has inconsistencies with house requirements. This is especially necessary for OJS because it does not flag problems as other submission systems do, and does not merge files for an author to see is his/her submission is correct or not.
As OJS 3 stands now, the editor has to do all the work and upload files for the author.
Please get back to me on this.