For me, trying to change my local natural population of bee's or the locally adapted bee is a lost cause and was not what I took up beekeeping to do. When I was forced to look at what "nature" had given me the choice was quite stark, on the one hand, change the local population to what you want or stay committed to the reasons I took up beekeeping. Personally, I think its very difficult if you want both.
I'm also interested in some of the language used like "flooding the area" with my drones. Statistically, what does that mean? How do you determine what the population locally is for you to say with any confidence you have flooded the area with anywhere near enough drones to make an impact. Seems to me you could be chasing your tail for a lifetime thinking your making a difference when the reality is, you've made no impact at all.
Interestingly and I think linked albeit indirectly, Richard Noel has put up a video a couple of weeks ago comparing different queens from hugely reputable queen manufacturers / rearer's. His results were inconclusive against the reputed "in bred" qualities and it will take Richard several years of comparing to say with any real confidence the reputed traits being bred in are actually present. This represents years of work by the manufacturers / rearer's that is not readily noticeable by the end user.
Furthermore, the team from the Netherlands breed their queens on an island 8km I think away from any other apiary. From manufacturing a large amount of queen's they only keep a relatively small number following what is I think, a largely subjective assessment of improvement. So what? This tells me, even for the experts, its a v difficult thing to do after years of trying. B+ has been doing it for a lifetime.
If I was 20 again maybe my outlook would be different and I'd try it but sadly I don't have the time left and I got into beekeeping for completely different reasons anyway.
Good luck all & keep the faith [just know when to quit whilst you're ahead
I seriously don't wish to p**s on anyone's chips if you fancy trying it, knock yourself out