Actually, Wlad's boxing technique is really good. He's got all the fundamentals perfectly. But he has now adapted his style and he doesn't need to use all the tools. Don't forget that his unbeaten winning streak is one of the longest ever at heavyweight. The guy has constructed a great career just by the last 8 years alone.
Dinovelvet, You may not rate them, but Sam Peter, Calvin Brock, Sultan Ibragimov, Ruslan Chagaev, and even Mariusz Wach were all undefeated at the time Wladimir Klitschko defeated them. I do not see any of them as being too much different from Pulev in terms of accomplishments. I like Pulev alot, and I want him to face WK after he gets done with Povetkin in early 2013, but I can't say that he is a more likely victor than Peter in 05, Ibragimov in 08, or Chagaev in 09. Ibragimov and Chagaev had even won title fights, so I place them higher than Pulev as of now, despite his good wins against Dimitrenko and Ustinov.
You can say the same about a lot of these guys. As an amateur he was behind these, at least: Povetkin, Solis, Sultan, Chagaev, even Glazkov.