Are you kidding me?
SM has been bumped significantly.
TSM squads now cost less and build faster, not to mention that for some inscrutable reason the devs also lowered the power cost of Dreadnoughts.
Both Chaos and SM can now mass marines incredibly fast, and SM can quickly field an alarming number of Dreads if you don't harass them to shit.
Orks are still shafted though; they have practically no anti vehicle, but they have had their melee ability revised (the AI now automatically seeks squads to engage in melee, meaning that a large mob of orks can tie down multiple squads and that dancing is a bit more difficult now), they can put out more things early game without having to build banners and the Stormboyz have been given a different armor type (they're heavy infantry now). It still doesn't compensate for their horrible lack of Tier 2 though; as soon as vehicles pop out they're dead, and SM and Chaos can just mass marines and bolters even easier now.
Haven't checked Eldar, but aside from the warp spiders doing less damage to orks, I don't think there's been that many changes.
