No answer from me -- just peripheral thoughts.
Since DLOs have been effectively obsolete for the past decade at least, it's unlikely that there will ever be any enhancements to any product for handling them. If you have found a way that works in any current product, you probably should stick with it.
Best option might be to move everything out of /QDLS into a modern file system. Every new version of Windows makes /QDLS a little less compatible. It might not be long before /QDLS isn't supported at all, even by IBM. Support levels are cut back a little in every release of i5/OS partly because Windows networking protocols are moving away, but also because there's no chance of adding anything new.