Rodgers connecting on a few more passes wouldn´t have resulted in the Packers winning against Denver, Carolina or Arizona in the regular season. While #12 for sure didn´t play up to his potential I don´t think it´s fair to solely blame him for his below average performance as the receivers had trouble getting open, the running game wasn´t working and pass protection was terrible at times.
Also I´m not sure why you´re confident we could have done any better than the Panthers vs. the Broncos in the Super Bowl after the way Denver outplayed us in the regular season.
Raji decided to take a hiatus from the NFL for at least the 2016 season, there´s an entire thread about it:
https://www.packerforum.com/threads/raji-to-retire-from-nfl.65901/page-2#post-657233
There´s no reason for the Packers to be interested in Okung.