Pretty much this.^ My Husband (Buddy Healer in Raids) learns differently then I do, I can read/watch whatever and understand the fight the moment I go in. For him, it is repetition/hands-on that works the best for him. (He'll DF an EX primal 100 times to learn it on his own if he has to).
My group has been down a DPS for a while, so we queue 7/8 for A4 and more often then not we get a new person. We offer TS or a text based explanation of the fight and 99.99% of the time (except for 1 cuz our OT messed up, lol) we 1-shot it. It took no less than 5 minutes either way to explain it and instead of wiping over and over and raging, we were done and out.
To me, it was simple, clean, to the point, and we got out faster than we would have ignoring the new person and rushing it. (Would have offered them to join our farm party, but never on the same server

).