[Update #2]: Dota 2's Patch 7.33e has brought in nerfs to most of the overperforming heroes from the Bali Major.
[Update]: Dota 2 is getting rid of its Battle Pass and instead focusing on more frequent updates.
Ever since the absurdly massive Patch 7.33, Dota 2's balance has been all over the place. It feels like every week a new strategy is discovered that completely eclipses all others and skyrockets a new hero or item to the top of the meta. While this sort of stuff is fun for a short time, seeing the same heroes appear over and over again does get a bit tiresome, which is why I'm happy to say that Valve has now unleashed the balanced-focused Patch 7.33d!
First and foremost, Vanguard has been nerfed. Both it and the Ring of Health now provide 4.5 regeneration instead of the old 4.75, while Vanguard's damage block has been decreased from 56/28 to 50/25 (melee/ranged). Additionally, you can no longer disassemble Vanguard to build Octarine Core as its recipe has swapped a Ring of Health with another Void Stone. All of this combined is a relatively small nerf to tanky offlane heroes, but given how these types of tweaks tend to go in Dota 2, I have a feeling it'll end up being quite significant once the meta settles down a bit.
Additionally, Patch 7.33d has brought with it nerfs to many of the overpowered or simply annoying heroes. As such, you can look forward to heroes like Abbadon, Arc Warden, Clinkz, Legion Commander, Marci and Windrunner being a bit weaker. Still perfectly playable by the looks of things, mind you, just a bit weaker than before!
The one unfortunate thing with Patch 7.33d is that it didn't bring with it many buffs. So if your favorite hero is someone like Invoker or Vengeful Spirit, I'm afraid you'll have to wait until the next update for some much-needed tweaks.
Once that update arrives, or Valve announces something juicy, I'll make sure to let you know. Until then, have fun with the new patch!