I was making some changes before that pushed some features over to another column which may have been the cause of it looking messed up, it should hopefully be fixed now (in that it looks okay when I check it, but all too often "Technology!" *Shakes Fist).
I think that destroy undead isn't worth that much since as you say, it is only vs. Undead, it seems almost like a ribbon ability. At 14th level, they also gain the upgraded Divine Strike from their domain although I don't think that the cantrip cleric gains an upgrade so it really does depend on the type of cleric, weapon based or caster based, on how little they gain at 14th level.
You could possibly give them a 5th cantrip at level 14, it's a little something extra.
I checked it on the original cleric, 3rd level was a dead level there as well, I think mainly because they gained access to a new spell level. Comparing the two, warlocks only gain their invocations at 2nd level so you might want to consider giving the cleric their divine domain feature at level 2 and their divine gifts starting at level 3 or the reverse. You probably want to give the cleric the domain ability at the same time as channel divinity since it is when they gain their domain's channel divinity feature.
Fair enough, I am just tossing ideas around to remove one or two of those ---- levels. Although, This cleric is already a bit more powerful than the Base Cleric, with the power the Gifts add. I would be fine with pushing them to 3rd, especially since a lot of those Domain based Gifts will act just as well for Domain Defining abilities.
Unless the link above leads to a different location than your new update, it is still messed up. The text under Gift of yggdrasil, and the entire Greater Bane I think, are both off to the side.