There's a lot of changes besides the usual number tweaking to warlocks in patch 5.4. We'll wrap up the say before patch with a loot list, but here's a prose version of what the patch notes mean before we get into the shiny gear drops.
Overall, there's probably a small nerf in damage since heavy movement fights will affect us once again. Our damage is shifting to our DoTs primarily with some support either from fillers on the move or a twist on our Dark Soul cooldown, depending on the level 90 talent we choose. Since the RPPM system has been tweaked a little to account for haste affecting not only proc bonus but proc chance, we also may see a shift from haste gearing to more solid mastery gearing, also since mastery for all three warlocks boosts damage done in our top damage spells.
But check after the break for more specific changes.