I used to think the band (or Mike) should have Chester more present on the tour (even in FZ's booklet), but if it's too hard for me I can't imagine for them. Mike did the PT tour, they did the Hollywood Bowl show, released Friendly Fire, and besides Chester's family the guys are probably the ones that suffer the most.
I was watching the hollywood bowl show yesterday and it's impossible not to cry, specially OML, which is pretty obvious they won't play for a long long time. Maybe a couple of songs from the record could be played eventually, but I just can't imagine how hard it must be.