While the advocacy of macros is cool and I was not aware that I could use them to adjust system settings but that's a little beside the point that Shurrikhan got - That being that all the tells should be clearly visible on the default settings. Usually they do this right, per your examples and Jeuno's first fight having a prompt in chat, in Vanaspati "What Is Left/Right?" Then they screwed it up in OC with the berserker where the only tell I could see (sometimes) is where his axe was positioned - The cast bar tells me nothing, the chat box tells me nothing and if I can't see it over people's effects on the default settings, as far as I'm concerned that's the devs mistake.
I'm all for "natural" or "intuitive" tells but if they're likely to be obscured in a default environment then there either needs to be a change to that default environment as Shurrikhan suggested to make those tells show up over the effects and/or there needs to be a clear back-up tell of some kind.