The major problem is that this version of the Fantastic Four's origin story isn't as much fun as the original, in which Reed developed an interstellar spaceship that ran into trouble as soon as it left Earth, exposing Reed, Ben Grimm (who was piloting it) and Reed's fiance Sue and her brother Johnny to the radiation of the Van Allen belts. The 2005 film was a variation on this - exposure to cosmic radiation on Reed's privately-owned space station. In both, Reed's wealth gave them independence and allowed them to become celebrity heroes: having superpowers could be troublesome (especially for Ben Grimm, with the world's worst skin problem), and the four squabbled and fell out in the way all families do, but on the whole being one of the team was pretty swell.
Not so much in the new version (and here, I guess, mild SPOILERS), where the transformation doesn't happen until more than halfway through the film, and the four nascent superheroes become pawns of the military-industrial complex. Despite the lead actors' best efforts to breathe life into their characters, it's a disjointed mess, focusing on construction of the plot MacGuffin and gloomy moral quandaries at the expense of the bits where the superheroes strut their stuff and the crucial annealing of the four as a team. If only it would put an end to the formulaic origin story - hero gets power, fights villain they've accidentally created, establishes franchise identity - repeated across original film treatments and reboots. But it probably won't even succeed in that.