Re: Wanting to capture genetics of Queens
I've found the same thing, the queens I buy, it's their daughters that are the performers. I don't think you'll have any problems grafting from them, myself. I will say tho that getting the drones from the purchased queens in the area for mating your best local stock is a good option also. The drones for mating are just as important, or more so, than the queen being mated.
20+ years, raise my own queens, feed when needed. I treat, but have not perfected varroa management yet.