To help answer the LOA to furlough question, I found this on the LOA page on dlnet:

“ In the event of a reduction in force, Delta employees on one of these approved voluntary unpaid leaves of absence will be treated as if they were active for this purpose.”

So to me (a Non Educated Delinquent), sounds like if you take a leave and then get F’d, you will get the furlough pay and bennies, duration TBD.