In the new patch both the normal heal spell and the new lay on hands spell had their percentages change depending on the player's skill points, however, this has not been applied to the great heal, which appears to heal semi-randomly in the 70-80 percent range despite saying it only heals 45%. Luckily since it shows how much healing would have been done showing this in numbers was much easier. For reference, the changed numbers of both the heal and lay on hands have healing set at 55%, and this is consistent with what I've found.
