FO3 wasn't perfect, but it was substantially better out of the gate, and the 1st two patches pretty well fixed it.
Not really, Fallout 3 was probably Bethesda's most polished game out of the box, but it was still incredibly buggy and the DLC showed no sign that Bethesda had actually tested for any. The Pitt in particular had one of the most embarrassing initial releases I've ever seen; the game consistently crashed when the player approached the railway tunnel. Fallout 3 is
still very buggy, and the DLC hasn't been patched at all outside of the fix for the Pitt crash, but the Pitt had many other embarrassing and obvious bugs outside of that which are still present (disappearing autoaxe blades for example).
FONV was a disaster when released, and after 1st patch is still pretty buggy
Sometimes I wonder if I'm playing the same game as everyone else because I haven't encountered very many bugs aside from the usual technical difficulties that go hand in hand with Bethesda's modified GameBryo engines.
Just clipping errors (stuck monsters, etc) is about 10X worse in FONV then it ever was in FO3
I agree that spawn placement is pretty bad in some areas and I'm hoping this will be improved in patches, but give Obsidian credit where credit is due... at least corpse meshes don't morph into freakish shapes and NPCs don't fly through the air or fall out of the sky at random like they did in Fallout 3. Well, I haven't seen this happen in NV yet anyway, and this was a pretty common glitch in FO3.