As the suggested model stands it is biased against batsmen in that, if they score 100 but were incorrectly given not out on 5, that goes in the books as a 5. An alternative scenario would be If they are incorrectly given out lbw on 5, on a dead flat track, with the ball doing nothing and them in the form of their life. That goes in the books as 5*. Now because it's not out, that will help their average, but what it can't factor in is what they might have done, ie. gone onto to score 200, or nick one to the keeper next ball and still be out for five. Either is possible, but not captured in the stat. Therefore, it enforces the downside of the concept, but doesn't offer the upside that theoretically should exist.