I have mentioned this phenomenon on several occasions in the past in various threads. I call them parasitic morphs. In my search, most of the VOOTW Characters have these, many of the Zeddicuss one-click pose packs also (Drunk and Hungover is a very well known example). I did the same thing to a new asset library, and it does speed up load times a bit. Putting your library on an empty, or nearly empty, SSD helps too. Don't forget to move the database to SSD also.
One thing you can check, if you must have the offending morph loaded is to check to see if "auto_follow" is set 'true'. and change it to 'false' or remove the line entirely. That usually helps, but it is not 100% effective.
You may already know that .dsf files are plain text unless compacted, then they are are only zipped up. As far as I know only .dse files cannot be decrypted, a .dsa file is a text version of the .dse file (same format, no encryption).
DAZ will naturally slow down even without errors as you morph library grows. But the errors cause DAZ to look for the morphs at least twice, and also write the result in the log file! All of that slows the process. It is tedious to investigate and remediate all the errors, but it does pay some benefits on larger asset libraries.