Essentially, treat the client as a client to the API that is the game and that presents the game world. I like the idea of customized clients, ala WoW's add-on

Essentially, treat the client as a client to the API that is the game and that presents the game world. I like the idea of customized clients, ala WoW's add-ons back in the day. Looking at the screenshot in the article, the idea of treating visible weapon ranges as a cheat strikes me as less balance than artificial difficulty. (Especially considering how many games have exactly that feature.)