What it says on the tin and just bare with me here.

Level 100 ability for Paladins (or maybe somewhere between 90 and 100) that gives them a Resurrection which has a similar cast time to that of healers or you could use Requiescat to instant cast it.

This has been on my mind for some time due to the Paladins sort of very lightly blended nature between a tank with a clear 'white mage' style of healing (Yeah I know its just Clemency but still) Holy Circle and Holy Spirit both kind of remind me of that merging a bit as well.

So theming wise, Paladins having a res seems to make sense to me though I could be wrong. I do think however it would add a whole other neat dynamic to dungeons / raids as if the healers die, the local RDM die / SMN die .. and you have a paladin, it might not all be over just yet!