I'm really sorry that you don't understand how AoE healing caps work and what effect that would have on a spell if it was suddenly removed. It was clear to everyone else at the time.
For a time in WoD beta Revival was turned back to 6, about the time they reworked Uplift to also have a 6 target AoE healing cap (and when Tranq/Hymn/HTT had their caps removed and were reworked to work the same way Revival does now, having no cap and affecting all targets the same). This resulted in a ridiculously weak Revival when the patch went live, hence the hotfix before WoD actually came out. But yes, the intent for it was to be about the same strength as it was in SoO, which it has been.