Dr Horrible

Like many of you out there I've seen Dr Horrible's Sing-Along Blog. I liked the first 2 parts and the cameos but hated that Joss upheld his belief that the good die young like Tara and now Penny. The songs were not very memorable and speaking of that, what I really want to know is why, if it's called "Dr Horrible's Sing-Along Blog", weren't we given the lyrics to sing along with, why not call it "Dr Horrible's Musical Blog"?  All in all I'm glad I watched if for free as I wouldn't want to waste my money to see it. 

ETA: Go read amaliedageek's alternate ending here - it's ever so much better IMO