By default all collections are included in PRAs. Anyone with large or unusual collections will have lag problems because L4 is attempting to read these and create PRAs. I think it would be wise of Logos to have the default to only include the default PRA with instructions on including or creating additional collections to tweak this listing.
If you cannot make this process more efficient on all computers using Logos, then you are only asking for more complaints if you do not change the default before release.