I think the thing he has generally failed at is style over substance, which isn't what reboot fans want.
A lot of people are anticipating a sort of revitalization of the
franchise as has been done with Batman.
Lofty expectations, and I'm just not sure it can be done. Batman is only a man, so everything that happens within the universe is more realistic.
being an alien automatically makes the film more difficult to make "gritty" like the new Batman.