First, we saw the complaints about Paladin’s T14 being so overpowered compared to T15 which resulted in the nerfing of T14 on the PTR, but with a buff to Daybreak which allows it to stack. But they must have deemed a 2 stack of Daybreak too powerful, because it has been somewhat nerfed on the PTR.
Daybreak now heals nearby targets for 75% of the original healing done, down from 100%. Now stacks up to two times.
Still better than what it is on live, but again reduces the appeal of the Holy Pally T15 again (2 pieces: Increases the healing done by your Daybreak ability by 50%.)
Things still aren’t final on the PTR, so we could see more changes before the PTR goes to release candidate and 5.3 officially being launched.