I'm not Avellone, but I've read every interview he's done concerning Revan and the Echani. Compare:
"It is the way of the Echani to be able to read their opponents - to know where an opponent is going to strike before it connects, anticipate it, and then strike against them. Echani battles are fought several minutes in advance - in many ways, it is much like the game of dejarik played in the core systems. The most advanced among the Echani are able to predict the course of battles by months, and the most revered are said to be able to predict the path of wars. Only Revan ever demonstrated such a skill in war. And even as he slaughtered us, the Echani still respected him."
―Brianna (Star Wars: Knights of the Old Republic: The Sith Lords)
"The Echani rely heavily on hand-to-hand combat and personal shield technology, and they had their asses handed to them by Revan during the Jedi Civil War, because, not surprisingly, there weren't many people able to face Revan across a battlefield and survive the encounter. The greatest among the Echani are said to be able to read their opponent's moves so ell they can predict the path of a battle several seconds, sometimes even minues in advance, by gauging their opponent's fighting style, heart rate, and ther movements in combat. In many ways, the Echani see combat as a rapid dejarik game, calculating feints, attacks, and dodges with a speed that few can surpass."
―Chris Avellone (Knights of the Old Republic 2 Head Writer)
"I always felt Revan was an incredible tactician, and the Echani were awed by his precog[nition] and natural skill with tactics."
―Chris Avellone (Knights of the Old Republic 2 Head Writer)
--- --- ---
Avellone views Battle Precognition as a excellent example of tactical and strategic prowess. If he said Revan needed actual prepreation, he would have said what he did when asked about other versus, in which he literally said, "... where Mira has had a few minutes to prepare before the fight and..."