i'm not crazy about afterglow. i find it a bit flat, and it lacks an instrumental section to breathe. nevertheless, i think it works well as a live number.
I think an instrumental section is lacking on Undertow and perhaps on Heathaze, because I think the songs were written with this structure in mind which is typical of Tony. Particularly on the former you can hear how it was edited and the song suffers a lot but Afterglow, whether one likes it or less wasn't imo conceived in that way and of course he could have squeezed an instrumental section in but just like Many too Many the song works fine without it and doesn't require it.