I think it's pretty normal that most resolutions come in the last part of a series, not in the middle. That doesn't mean, though, that this middle part is unimportant. The thing is simply that WoT had an exceptional scope. One can compare this e.g. with Song of Ice & Fire or The Malazan Book of the Fallen. However, it's in my view dishonest to compare WoT with other works, which were simply constructed in a shorter way, and then critizise in the middle of the series that WoT is too long or pointless, that nothing happens or is ever resolved. It's like comparing a TV series like Lost with a 2 hours fantasy movie.