There is one side benefit, for arguably cosmetic reasons, that I'm looking forward to now that spellpower has been consolidated, and that is the fact that caster swords that previous benefited mages, warlocks, and even prot pallies will now be worth something to the holy paladin. Sure the shape of a weapon doesn't matter much when it comes to the stats needed to heal, but visually I find the sword more appropriate for a paladin. For a blood elf paladin, it's even their starting weapon.
Back when I was leveling Gillien in Azeroth I used swords almost exclusively. Spell damage and healing didn't exist for most weapons, and stylistically it seemed the most appropriate.
But come Outland, where all healing weapons are either maces or staves, and being that paladins can't use staves, the mace became pretty much the only choice for a holy paladin.
WotLK doesn't have very many caster swords, but compared to the say… zero healing swords available in BC it's better than nothing. Personally I'm hoping to snag a [Jeweled Coronation Sword] once it comes time to replace my [Gavel of Naaru Blessings]. No, it's not the best pre-Naxx healing weapon out there (spirit makes the pally side of me sad), but I certainly won't object to having it.
And then in Naxx itself there's the Grieving Spellblade (10-man), Life and Death (25-man), and The Turning Tide (25-man).
Of course it's not likely I'll see any of that soon, but if I can just get one healing sword and for it to be useful for me for a fair amount of time I'll be happy.