I suppose the question is, how would you define last gen and which game is close to that description?
Although there were a lot of games that were good, there were too many games that focused on graphics and the game play suffered. It also was the beginning of the end of exclusivity and companies porting their games over to as many consoles as possible. This generation also saw the downfall of many franchises because of bad decision making at the top.
For me, no game exemplifies this more than Final Fantasy XIII.
This game was made for trailers and screenshots. Everything looks pretty but there is no substance.