I'm listening to H.A.A.R.P by Muse and it sounds great yet it feels absolutely pointless. All the songs sound just like their studio counterparts bar minimal stage banter and crowd cheering. I give great credit to Muse's talent and skill for this but it makes the CD (not necessarily DVD) songs seem redundant. I understand at a Wembley gig you could hardly perform alternate versions of songs to such a big crowd yet it would make a more worthwhile live album.
If a band is near perfect live yet sticks to the studio versions of songs it's great for the crowd but pointless for a CD release. I'd much rather hear live albums like Dylan's 1964 and 1966 Bootlegs which contained better versions of songs (e.g. Spanish Harlem Incident - 1964 and Ballad of a Thin Man - 1966)