The main focus of this site is the pre-crisis Superman of the Golden, Sliver and Bronze Ages. So you might be better off or have better luck finding the answer on DC's own Superman boards than here.
The Sliver age? Is that the one where Superman gets real thin?
Sorry but while the focus of this site is the Gold thorugh Bronze there are stories from the Iron age as well "Identity Crisis" is definitly Iron Age.
Byrne had some good ideas in doing the revamp. The Silver-Bronze Superman was becoming much like the Brown Hornet who got out of impossible death traps by using his "increadable powers". Yes there were stories like "How to Tame a Wild Volcano" and "For the Man who has everything" but there were also "Lois Lane Witch of Metropolosis" and "Superman vs Ghost of Ceasar". Every age has is good points and bad ones. Superman is a reflection of our own culture and times.
I should point out that if you dig a little beneath the surface there are plenty of problems with the Silver-Bronze Superman. Weather control devices that could prevent floods are never used, fantasic krytonian cures that could have been adapted to help Earth human but again never used. Superman charging in to situation where jsut a little bit a of caution woudl ahve saved him a lot of grief and lets not forget the few times Lois and Lana got sueprpower and Superman let them behave like spoiled jerks rather than encourage them to do something useful with their powers.
if the iron age Superman flawed? Sure but then again so are the Gold through Bronze Supermen.