Honestly, I don't think it would've made a difference. Hard or soft, any reboot was bound to be controversial.
With a hard reboot, there would have been less sense that it was contaminating or ruining what preceded it by tying itself in, which is where a lot of the "Abrams has killed Trek" stuff seems to come from.
(I also think the commonplace contention that fan reaction to any possible product would have been precisely the same isn't very convincing. The actual quality of the product matters, in the short run and in the long run.)