I completely understand what you are saying. All the teams are NOT powerhouses in this league. In a $100 million league, the offenses are valued around $50 mil give or take. So with bench players and everyday players say 14 players (the other 11 players on the roster are pitchers). Let's say the 5 player bench is valued conservatively at $5 million, or an average of $1 million per player. For some teams this is high, for some it is low. So that gives us $45 million for the 9 regular players or $5 million per player. That is not a power house in SIM or in real life.
In a small sample size, Rivera ought not have blown 3 save opportunities in 10 tries with most of the season to go. If we project this throughout the season, he will blow about 10 save opportunities. He's never come close to doing that in his life. One Rivera has already blown 7 saves. He is set at closer and I'm assuming the default is probably a pitch count of 20-25. That projects to about 20 blown saves for Rivera in the course of the season.
Most players I've seen roughly emulate their seasons or perhaps earn slightly fewer wins or hit slightly fewer homeruns. I wonder if the programmers have their favorites in this league. I wouldn't be surprised to find out that SimLeague was developed at BU by a Red Sox fan. LOL