Redgopher, I agree with you 100%!
People, we're not saying that WW was "Trigger Man" or anything, but it had levels and gameplay elements that were very promising, but were all squandered on frustrating battles, confusing backtracking, and juvenile "baditude", it was a real let-down, especially after SoT. It stained the memory of the first game, which for many of us was like reading a really great piece of literature... and then then finding its sequel was a picture book drawn in crayons.
The game lacked imagination.
PoP3 is a return to form for the series. It is light years ahead of WW in every imaginable way. It has a great story. Great environments. Great gameplay that I found NOT frustrating (just challenging). That it does not ignore the plot of the second game but still manages to pull the series back into coolness is an amazing achievement.
If you're not the sort of person to repeat games, you can easily beat it in a rental, especially on "easy". I'm glad I own it, personally.