Kaiyanwang
Adventurer
Really? As you can read above, is not my favorite edition but between PH1 and Essentials, I would go PH1 without a second thought. it's overall more interesting and more... for lack of a better word, "confident" about its design principles.If 4E was just essentials at launch, and if the online component completed, the game would have been successful.
Thinking that the Essentials Slayer would be preferred by 3ed players because is "similar" to the 3ed (or earlier editions) fighter kind of misses what made the new 4ed combat less interesting to some, and misunderstands what people find enjoyable in 3ed melee (which is different things for different people BTW).
3ed framework with "powers" is something that people with a 3ed preference enjoy. Not me, but think about how many love Tome of Battle. When PF1e came out, Dreamscarred produced a PF1e version.