Dylan's not unique in this casual, carefree delivery of a back catalogue.
The Stones (and Jagger especially) effectively 'put the cue on the rack' in about 1972.
It's not about being true to the song any more, it's about being seen from a distance, with a huge logo as a backdrop, a fully-stocked merchandise stall, and getting the live CD (soon to be replaced by the extended, and then the extended deluxe CD) in the shops or on-line as soon as possible.
The clever money is to drop down a division (ironically, the same is true of football - Brentford is a far more enjoyable experience than Chelsea in 2014) and seeing the likes of Donovan etc., or in my case in June, Linda Perhacs. That's where you'll be more likely to see and hear the spirit of the 60s, not at a big football stadium.