Savage worlds I can't comment on as I've not used it, compared to HERO BRP is nowhere near as complex ( imo ) you can make it complex by adding stuff into it, but at heart the mechanics are pretty simple, You can model fairly complex activities and ideas but the rules are not as complex in a fiddly lots of stuff to remember sort of a way.
I would say yes, but then any halfway decent system will, it's more down to the gamesmaster and players to achieve this. Check out some of the settings both official and monograph to get an idea of what it's capable of.
I don't own the hardback so I'll let someone else handle this one
Well, BRP in it's current form has been around for about 4 years. Product has been pretty slow from Chaosium ( but that's chaosium for you generally speaking ) 3rd party stuff has been interesting, Alephtar Games have produced some stonkingly good historical supplements eg: Rome, Merrie England, Crusaders of the Amber coast and a BRP mecha supplement is in the works. Cubicle 7 have produced a modern Cthulhu style game which uses the BRP engine.
We do have a great community here ( well, I think so ), friendly, helpful, full of ideas. Enriched a great deal by the fact that a lot of BRP authors/designers/publishers post here regularly.
You're welcome.