I agree that there needs to be a lot more of the understated theme, but I don't think they should use Barry's approach to the action scenes as you described it, it's a bit dated now. I love those pieces of music, but I think in most cases they make the scenes a bit run of the mill... the same melody over and over gives the scene a bit of a production line feel and makes them a bit monotonous.
I think the Barry is only dated because no one uses it anymore!
I tell you what, though, something has to change with modern action film scoring. The relentless and tuneless thundering of percussion and orchestra throughout action scenes (including the recent Bond movies) is extremely tired and boring. There is actually an art to scoring action (it's all about raising tension) but no one seems to know how to do it anymore. The contemporary approach to scoring action scenes is VOLUME!!! all the way through.