Please give Fargo, American Horror Story and True Detective Season-Specific home pages.

I agree 100%.  Each season is self-contained with different actors, different stories, and probably different directors.  Each season also needs its own separate trailer.  I was telling a friend about the first season of Fargo but when you click on the Watch Trailer button it brings up the second (current season).

Absolutely agree.  They are completely different shows other than the title. 

Another advantage is most people would give seasons 1 and 3 of True Detective a high rating whereas Season 2 would receive a low rating.  Separate pages  lets potential new viewers know which seasons to watch.