Even though it was exactly what the architects tried to do post-war, I personally think Coventry once again needs to start from scratch. I mean, definitely keep Gibson's Cathedral, Spon Street/ some of the more meritable post war buildings, but otherwise, the whole general precinct and surrounding areas need to go. I've seen some of the redevelopment plans and they look interesting, but I personally think Coventry needs SOMETHING that will stand the test of time.
In Coventry's case, I don't think restoring historic buildings would be the answer, as virtually nothing of the Medieval street pattern survives. Unlike in Exeter, where you can see the Old Roman grid layout, where historic architecture should be restored.
I don't know if this post will get much of a response, but I believe the size of the city should have a bearing on the type of architectural regeneration it receives. I don't know why people don't see the logic in this, but restoration of historical buildings should be done in smaller cathedral cities, since it would massively contribute to tourism in these places, like it's done in Dresden in Germany! I know there have been some faux restorations, i.e Bath's Southgate, but they've been very few and far between.
As I have said before, buildings such as the Dancing House in Prague would look great in places like Leeds or Leicester, as its tasteful style would place a very harmonious Old-New balance!