'the lamb' tour setlist consisted of the whole double album, plus an encore. it was a risky decision, specially considering that the audience wasn't familiar enough with 'the lamb' yet.
in that way, genesis were ahead of their time, since it's becoming more and more usual that some artists play certain albums live entirely. there's a peter's live album from 2014 that includes the whole 'so' tracklist. kate bush, on 'before the dawn' tour, played the ninth wave (second half of 'hounds of love' album) and a sky of honey (second half of 'aerial') entirely. similarly, u2 recently played the whole 'joshua tree' album, suzanne vega did the same thing with 'solitude standing'...
the difference is that those albums are from about thirty years ago and the audience know them well. 'the lamb' had been released shortly before (if at all), and that's why that tour didn't quite work.