http://www.ign.com/articles/2014/01/22/assassins-creed-3-dev-explains-alleged-development-troubles?abthid=52e0262f9d1422b964000028
Assassin's Creed III has been criticized in the past for technical problems it suffers from and certain aspects of it feeling disjointed. According to an online post from someone claiming to have worked on the game, there's an explanation for those issues.
In response to a post on Reddit inquiring about what happened with the development of Assassin's Creed III, a user by the name PreludesAndNocturnes responded with a lengthy explanation, noting he or she "worked on it unfortunately." The post is prefaced by saying this alleged staffer only worked on the single-player mode and "cherished" the time he or she spent working for Ubisoft. As the developer's identity is unverified, this should all be taken with a grain of salt.
"Without going into too much details," the post reads, "basically because of ridiculously unrealistic expectations and constantly tacked on features by producers / the creative team, it became literally impossible to get everything done with just Ubi Montreal."