Simple like 1,400 skills, right?
Fact is, any player worth his salt can state the general effect of a skill upon seeing its icon, if not quote the description entirely. In fact, because the icons show up so often (and because they're unique, unlike WoW's - something I always liked), a number of players can match the more obscure skills' effects to their icons but not to their names.
Reskinning banners and turrets isn't a big deal. It's not unlike shaman totems - if it glows green, it's an earth totem and likely has effect X, Y, or Z and is priority N. If it's blue, it's likely... etc.