From history perspective going back from iron age to bronze is implausible (at least on Earth) - we had bronze age empires that fell and humans needed to use iron to not regress any further. Switch from bronze to iron was not really progress (to people of that time). They were forced into it.
You can go with logic that Savarra has different mineral compositions (more tin and copper) - then there is an argument to be made that Belharan Empire would not go into iron age at all - as bronze, in a lot of points, is better than wrought iron (which from chemical pov is alloy of iron and coal - same as steel - difference is in percentage of coal - ancient/medieval people didn't used pure iron - they were too shitty of metallurgist for that). Also bronze is not that bad in terms of weapons or armour
@Wint3rRyd3r - we have some examples of medieval bronze maces and Romans used bronze armour to around first century (so around 1000 years post bronze age). Hoplites used iron weapons but bronze armour, if they were rich enough, most of them used Linothorax.
Also typically for any other fantasy setting - in CoC2 there is no arms race - you have advance anti armour weapons (like poleaxe with wrong description, halberds and supposed war hammers) without advanced armours (you have hoplite armour and nothing like Dendra panoply - which predates hoplites around 500 years
). Funny thing is that making full plate armour with bronze would be far easier than with wrought iron or steel, if you had so much of bronze.
Blacksmith would not work with bronze at all. Different methods, also etymology of word blacksmith suggest someone that works with iron. I don't think there is historical word for bronzesmith (that one is derivative from blacksmith).
Personally I have no problem with how much historically inaccurate CoC2 is (if you even can use that term in context of fantasy game). But I cringe when people try to claim any historical merit about Savarra. Simply left it in the realm of fantasy and let authors write however they want.