There may be an issue with the fact that this is a global game played on 1 server, and parts of the world use "," identified here as our friend the comma as a decimal point.
That problem is easily solved by a junior programmer who spends one hour searching the web about localization. In software development terms, this is so easy to get right that it's inexcusable to get it wrong.
I have to agree... It would be nice. At least add an option that allows you to change the view on how you see amount totals... so that those that don't care can just leave it alone and those like myself can just select a "Add commas in value amounts" option in our UI options.