I honestly don't see a need for this but it would fall on deaf ears I think. Not to say they wouldn't listen but they already have pretty strong mindset on this. Problem is not the bad years as far as spawn but the really good years. Right now the way things cycle around most of these lakes are good and most years one is really good with big fish being caught. If you added fingerlings each year then you take the balance out. Between the spillways releasing fish, some years a lot of fish, and a bad spawn from time to time the numbers stay in check.
For most Sardis had a tuff spring but I know of a lot of really good fish that were caught up there, prefishing the ACT we caught some studs. Part of the problem is that a lot of people measure their day by the number of fish they caught wanting limits. I've seem a lot of days this past spring that 10 was a good number with 2 folks fishing, it's all relative to the conditions of the day your fishing, to me anyways. If I'm fishing alone 5 is my goal, that's enough fish for Ms. Tammy and I to have supper.
The Big 4 have their own biologist managing them and they are managed to produce big crappie, that's the goal. Never in fish management have I ever heard of increasing numbers to increase size. The thought pattern has been to manage by size limit, length, and creel limit with pole limit thrown in the mix and I feel they will continue along these lines.
My 2 pennies for what they are worth.