It hasn't for me but over a million people bought the damn game so I guessing there are differing opinion such as this one.

This is kind of timely since I decided to go back to Forza 5 despite me losing my 400 hour save but it's all good since Forza 5 has my favourite driving model. Anyway I am excited for Forza 6 since as shown by the amount of time I put into Forza 5 I don't think it was the brand destroying game like some others do and I have confidence in Turn 10.