Folks, in game 7 of the 2010 finals, Ray shot a mere ~21% from the field. In essence, if he even did his normal scoring average, we'd have two titles today from the Big 3 era.
Thus, he's not something great.
In essence, being Robert Horry for Miami was a natural fit, for the twilight of his career. He was not essential to the Boston Celtics since '08, and really, if his shots didn't start falling during the Detroit ECF series, we were pretty much toast. He was laying bricks for two full rounds. There was a limit to the number of 7 game rounds we could handle. Fortunately, he started playing like a star during the last two.
At best, he was a silent version of Eddie House (and Eddie was also somewhat fearless in not hesitating to shoot), but Ray was given more props because of his Seattle days. Face it, the Big 3 was the Big 2.5 (plus the big bench of Posey, House, Powe, Cassell, PJ, BBD, T Allen).