Yes and No on the overpower chart, most definitly some armies have gotten only better, Warriors of Chaos, Daemons, but certain armies are greatly hampered by the new magic phase, mainly Vampire Counts, with a 50% chance to fail a casting on a single regardless of modifiers and with no longer being able to cast a spell after if you've failed casting one previously, an army could actually kill the zombies faster than they can be brought back, which I'm certainly not complaining about.
They are definitly going more towards rank and file troops, and combat res as Tim as said is going to be through the roof, especially with elite troops like Swordmasters, Chosen Chaos, and any other unit that puts out an insane amount of attacks.