I think the common misconception that UFE is bad for Holy Paladins is slightly misdirected. I absolutely agree that it's better on a throughput healer, but that doesn't mean it's bad for Holy Paladins.
Leaving a fully healed raid member with leech is only bad if they aren't going to be taking damage for another 10 seconds.
What little evidence we have suggests that UFE definitely isn't bad for Holy Paladins, but that's also a really small sample size. I've made my points about UFE
here and
here, so I don't necessarily want to argue them again.
Honestly, I think the trinket just hasn't been investigated enough to be sure that it's either good or bad. It's probably better than a 715 Winged Hourglass, but I don't think anyone is 100% sure.