Hi,
I made this for importing journal archives to our site: GitHub - ajnyga/tsvConverter: Excel to OJS3 XML conversion tool
You basically need to write your data to an excel sheet and the converter will then create OJS3 compatible XML that you can just import to OJS. Note that I did not design this for wider use originally, just happened to mention it in another thread here and decided to upload it to github (How do I import issues and articles from spreadsheet? - #19 by asmecher). So I can not promise any wide support or that everything will work as expected, but we have imported archives from six journals so far.
It still requires manual work to write the excel sheet, but that is definitely faster than using quicksubmit.