I created an account just to disagree with you. Helmet has a legitimate question about a technical limitation or flaw in a piece of software and you presume to know what he needs. You yourself are playing at a resolution higher than most people have access to, but someone with a higher resolution than you should drop theirs?
For OP, There is a UI scaling option on the first tab in the settings. I think if you double it it should look acceptable at full resolution on a rMBP.