With the pending dissolution of world servers, the potential exists for WvW to become chaotic with a plethora of commander tags running the maps. As allegiances to servers will no longer exist, it will become a free-for-all as guilds and alliances tag up all over the place. This suggestion seeks to alleviate some of the confusion by suggesting new icons for commander tags which visually communicate the role the commander seeks to fill. This isn't an exhaustive nor definitive list; rather just a brainstorming session to get the ball rolling:
The existing icon would remain and would likely continue to be associated with large-scale offensive zerging and karma training. Each of these icons would - as per the current icon - be available in the same array of colors. Selecting an icon doesn't force a commander into an associated role; that will be left to the player base to figure out on their own. At least there would be options available which - within the symbology of the icon itself - succinctly communicate that roles exist. Players could then - with a quick perusal of the map - find squads whose playstyle or goals match their own.
Lastly, as tempted as ArenaNet might be to monetize these new icons, I would suggest refraining. WvW is about to be thrown into disarray with the end of the servers. Throw us a bone and allow us to interject a little order into the coming chaos by just giving us the new icons without the hassle of a gem store purchase.