If the problem is "we're not accounting for holidays in our time estimates", I can't see how the solution could possibly be "time is obviously a flawed measure, so we'll use this other measure which has this hazy relationship with time, but we all agree that it's definitely not time, although we have trouble saying what it is"
personally, I find it much easier to say 'normally, I would get this to you by wednesday of next week, but we have that offsite and my wife's parents are visiting, so does friday work for you?'. than 'this is a 3', so, I guess this fits in this sprint?
changing units and names of things really seems like a deliberate attempt to rob the discussion of any actual meaning. just a comfortable empty formalism that masks the fact that we aren't trying to come to grips with the most difficult parts of our job
