No, the problem is that it doesn't make sense that you can't sneak attack an undead or construct in the first place.Dormammu said:The best example I can come up with from memory is the intention to make Sneak Attack usable versus almost anything (ie, they are removing immunity from constructs and undead and so forth).
Now some people may think "Hey, great! Rogues now don't struggle in those fights!" But all I see is that it made sense before and there's nothing wrong with Rogues struggling in those fights. I see the difference between an RPG (even an über war-gamey one like D&D) and a computer or miniature wargame is that RPGs are reflecting fiction and storytelling. If you look at stories, the idea of foes that tax the abilities of the character are a fundamental point.
The explanation is that "Sneak attacks go for vitals or other weak spots, but constructs and undead have no weak spots". Except that, I'm pretty sure if you jump a ghoul from behind and break its thigh with a hammer, it's going to have trouble walking.
If you had, say, used an ooze as an example, I'd have agreed. But undead and constructs have discernable weak points.