Many developers and publishers are just lazy these days and give the porting job to an third party, often an unexperienced studio. Just look at how Batman turned out. Hopefully these bumps in the road are due to them shifting gears on the new consoles and, like last gens will stop being issues after another year or so. Let's not forget that at the same time, standards for the general PC port have generally improved, what was considered an ok or good port 5+ years ago, is considered barebones today and very few games are in that state.