I've seen more and more of this on Veeky Forums recently, and I thought it'd be interesting to try and have a reasonable discussion about it, as well as open up an angle which I haven't really seen broached before.
Does game design matter in RPGs? How significant is the system you're using for the experience, and how big a deal are flaws the system might possess? Does the GMs ability to fix things via rule zero hold a much larger sway than design itself?
Those are the basic questions, but the new thought I wanted to add to the conversation was this- If you're one of the people who believe game design is not significant, then what do you expect of game designers? What should they aspire for when making a new system, or focus their efforts on? If ensuring all the mechanics involved in the system are fit to purpose, that the options are decently balanced and that it all generally works isn't a big deal, what else should they be doing?