Good luck at Lake Fork. I actually interviewed for the job of managing that lake 15 years ago. It wasn't a good fit with existing staff so I took myself out of the running but managing it would've been fun.
Truman isn't my lake but I was helping the biologist last fall with age and growth sampling and we got to talk about the crappie population quite a bit. MDC can be very conservative when it comes to regulation changes. There must be ample evidence that a regulation change is needed and that it will make a difference. Our procedures require us to convince a regulations committee of other biologists that our science is sound, we've considered all options and that we can predict expected outcomes. Then the Director and the Commission must approve the change. And this doesn't include public meetings where input from the public is gathered. This is much more rigorous than other states who have to go through the legislature to get regulations changed.