Now we have more of a challenge, chopping healers is a bit more difficult, but making sure you're always lining up your attacks is even more crucial (setting up lambs of the slaughter, for instance, which you should always do).
Warriors are being shaped for cata where we get colossus smash, where then we will tear things apart. 1v1 is harder now, but when in a battleground we can still put out a constant amount. 1v1 is trickier, still hold a good chance if you properly counter your opponent, but none the less, it is still a bit harder.
Either way, getting nerfed blows, but I think it's even better practice to work on getting a KB with basically overall 17% damage reduction. Just keep in mind colossus smash will be one of the main things warriors will use to output burst. So don't get too upset too quickly, not that bad.