I'm not sure if we're playing the same games, since UnleashedWii and Sadv3 seemed pretty outright terrible to me.. I can agree with the sentiment, though. When Sega gets to something good, they leave it. It's either that or they forget what made it work to begin with. A good example of this is Sonic 4, as well as basically any game past SA until '06 with the 'speed' based gameplay. They kinda just.. progressively forget what made them good and they devolve into whatever really bad crap because they seem to only pay attention to the superficial elements.