It would only improve the game by enabling a more sensible price range that allows for more nuanced pricing of goods and services. This is an area where the game could be improved and I for one would love to see Larian give it a go over. They probably should give currency a go-over at some point anyway because of some of the wonkiness with trading and currency being stored on different characters etc etc.
You do realize this is not an MMO with a player driven economy, or even an auction house? So the idea of nuanced pricing of goods is kind of irrelevant.
Why would any of what I mentioned imply I was asking for auction houses and player-driven economy etc? Seriously, that has nothing to do with what I'm talking about.
Ok so I guess you missed the point of what I am saying....
In a standard RPG, money is basically an after thought, since there is really no issue of throwing off an economy (like in a MMO). There is literally no reason to have a "nuanced" economy as you put it, since the purchase of items is defined by time invested and how much of a gold sink they want to utilize to limit your wallet. So if they decide to just use gold, and price the items in the vendors accordingly, it really doesn't matter if there is copper or silver. So if there is a weapon, item, armor whatever, and say that on average, selling junk or old gear etc from say an hour of gameplay nets you 300g. If they price that item you want at say 5k gold that is 16 hours of play investment to afford that item. That is how gold sinks work. That is what devalues the worth of gold without going so far to make coppers, silvers etc.