In the Undead Crypt now, just outside the fog gate. Really feel as if the game is wearing me down now, what an asshole area.
Don't really understand the 'flood the area with enemies' design choice. Sure, you could make a case that it freshens things up by providing more puzzle/strategy elements. But mostly it is just tedious.
I think your experience with the Pursuer is just the usual internet folk having fun. I heard one guy say that he killed the Pursuer with the help of a fellow on the ballista, then as he was heaving a sigh of relief, the same guy reloaded and shot him. Funny the first time it happens, I'm sure