I'm new to Directory Opus, coming from a Total Commander perspective.
I would like to suggest the use of the 7-Zip Z-Standard in Directory Opus. This is a much improved archive utility with new formats. The repository for this is here: https://github.com/mcmilk/7-Zip-zstd
There is also a website that details the performance gains: https://mcmilk.de/projects/7-Zip-zstd/
I use this on my computer and use the LZMA2/Fast algorithm as it's way faster than the standard 7-zip LZMA2 in vanilla 7-zip with even faster extraction time.
So, all-in-all it would be a welcome addition to the Directory Opus tool-belt.