I think overall it was their most mature album, they had a huge success with IT and the Tour and whilst there was pressure to beat that, the band didn't take the easy way out and as the band has done over the years, they all grew and evolved.
Phil did more on this album then before and it was very much equal, although maybe the songs excluded, perhaps could have replaced one or two of the others included (all subjective of course).
I know that by the Tour, a lot happened and it left Phil in a bad way mentally and with all the extra stress he was under, hiding away made sense and being pulled back into the band so quickly for that benefit gig, pretty much did it for him.
But I (we) will still wonder to this day, what the next album with Phil could have been like, had life taken a different path.
Music was changing a lot, but Genesis had survived over the years all the fads and threats and became stronger for it.
A 2006/2007 Album, (even just 2 or 3 new written songs prior to the Tour), may have given us a huge insight into just how these incredible artists could overcome all the doubters (Inc their own), and put to bed the biggest question, as to whether they could have ended Genesis on the highest of highs and removed the mixed 1996/97 period which I'm sure haunted Mike & Tony in different ways.