That's a good one. Even with a $200M Salary Cap and 5% drop penalty, teams in KL's with a high RV sometimes push the limit as they move players on and off the roster during the season. I know $999M is an option but....good recommendation.
There is enough turnover (read: often too much) with normal drop penalties. I cringe at what it would be like with none. I can't say it's a terrible idea since it would be optional, but it's sure an option I won't partake in!