The negative guy didn't have a strong argument, leaning too much on wanting the same film as JP and complaining about CG, which isn't indicative of any film's actual quality. But I think the skepticism he displays is earned, because I don't think the information was presented well in the trailer. I didn't want the trailer to be full of raptors and t-rex shots, but I wanted some compelling footage and better dialogue clips than what was shown. All the character shots were weirdly super plain and featured them standing and staring into nothing.
The positive guy was also taking an extreme side of liking everything that was in the trailer, but he was embracing change and I agreed when he said the previous JP sequels were redundant, and that Jurassic World is taking the story and moving it forward.