Accounting Setup manager - BSV Assignments to LE can be backed out

I have it on good authority - and some testing, and SR explaining the problem and the solution (none) - that once you have assigned a BSV to an LE, there is no way to reverse it, disable it, end date it or anything.  Has anyone found a work around?

Let's say you are running 15 BSVs in a single SoB in R11i.  After the upgrade to R12 it isa freeforall.  The Primary Ledger must be assigned at least one BSV.  You can also assign these BSVs to an LE, whether it is the default LE created from the GRE/LE or new one's.   If you decide to defer the decision till later, beware.  Once you have assigned them to the default LE, they can not be re-assigned to the new LE's later on.  You will have to create new BSVs, and end date the old ones.