computer analysis rating

Hello, I'm wondering if it's possible to show an estimate of how strong a game was from computer analysis.  The computer analysis on chess.com says 2500 strength.  I'm trying to reduce the mistakes,blunders, and inaccuracies it reports  Sometimes if I play an open game it will be 20+ moves and show very few of each, and sometimes it will show many mistakes : ). 

I'm wondering if it could say like, this game was played at X strength.  Is there another engine that estimates this, can chess.com computer analysis do it?  Is all the engine can do, is say how many inaccuracies, blunders, and mistakes?  It would seem like it could estimate more.

The first time i looked at that i thought it was my estimated rating...

I'd say that's a pretty generous assessment...

Has anybody tried www.ChessZen.com  Looks like their ELO estimate by analyzing the games is accurate.  They also have estimated ELO ratings of various world champions including Morphy, Fischer and Kasparov.

I have wanted this too. I think it would not only be helpful to both players. I would like to see a rating of each move/ best 3 moves at each move also, in addition to an estimate for how the game as a whole was played. I think this would also help us to see obvious cheating long before chess.com gets around to figuring it out. I think perhaps the last reason is why they don't put a system like it in place. They don't want a bunch of finger pointing for how a 1300 player suddenly played a move a 2100 player would make at a crucial spot, did they use an engine, get lucky, or was the move just obvious enough? Food for thought...