Sorry - still don't follow how the recruiting of aged pop stars can possibly influence the fortunes of the music one way or the other.
The strength of the revival has always lain in its democratic nature - it is 'our' music, as opposed to the pap fed to us by the machine (fine examples of which you provided). Can't see how taking on board the machine's cast-offs because of who they once were can possibly help. The songs and tunes, as old as the were, were never 'blasts from the past' (a phrase invented by the pap industry when it ran out of fresh ideas and material), rather, when they were performed well they were as fresh as the day they emerged from the heads of their makers, whoever they may have been.
Just as you appear not know who James Hogg's mother was (an elderly 18th century singer who once said something very wise), I find myself in the same position with Robert Hogg - manager of 'Millstream Recycling' maybe (yes - googling is fun).
Jim Carroll