It would be nice to be able to roll just a set of of orders, not individual POLs, or specific types of POLs. In our case, we have two libraries that prefer to have their orders rolled over on encumbrance, and the remainder on expenditure plus an FPC factor. We tried doing this this year by separately rolling the specific library's ledger and then associated POLs, but it took days. I think the issue is that it is trying and failing to roll every other active POL, and then just failing on those that do not yet have active funds.
Being able to roll this set of POLs over first would be much more effective.