Blizzard released the Alpha patch notes for Warlords of Draenor, yesterday.
There are lots of changes. In particular, they are ruthlessly purging a lot of abilities. They also look to be separating out the specializations a bit more, with more abilities become specialization-specific upgrades.
Crowd control is getting significantly scaled back, with many CC abilities getting the axe. Healing is seeing a large reduction in instant spells and smart heals. Some cooldowns and debuffs are being combined with others into fewer abilities.
There aren't really a lot of paladin-specific changes, though, other than the above. It looks like the paladin will be more or less the same as it was it in Mists.
I do like the change to Major Glyphs. Getting a few default ones while leveling will make using glyphs so much easier when making a new character.
Really, there's so many changes in these notes that it is somewhat overwhelming. It might be better to just read through them and let them digest for a couple of days.