First off a disclaimer: I'm no expert. Far from it.
But I always have an opinion! So here goes with the non-expert opinion.
I try to look at things from the perspective of the down side and the up side to an action I'm proposing to take.
To me, what you are proposing to do assuming you don't put something in the pond that will actually harm it, the only downside I see is perhaps a little time wasted by not getting other fish in there in the case if what you want to do does not ending up helping much. In other words, not much downside at all.
The up side is it might really work well. And if it "floats your boat" and keeps you interested in your pond project I say go for it. And keep us informed on how it goes.
I know my opinion is not what you are really looking for. You are likely looking for some of the experts saying "yes your idea is absolutely the way to go and it will increase the size and quality of your fishery". Seeing a lack of those acknowledgements by said experts I'm guessing there may not be enough data to support them saying such a thing.
It seems you have a well thought out plan and a logical progression of how you believe a pond should operate. You have my encouragement to try it, for all that is worth!
