You might find that your superseded queen is just as good or even better than the old one. I’m only using genetics from my better performing queens in order to make new queens.
To answer your question, yes I guess they would lose half of their genetics.
I like to see nice yellow bees also, I’m tempted to order some Italian queens in, however, like you they’ll only turn dark again in a year or two, the bees that is.
It looks like you’ll need to keep yours Italian, if you want dry caps… Me, I don’t care.
Do you know anything about guppies? I got some out of a pond near the trap out to put in my water chestnut tubs to kill mozzies. In a couple of tubs, they are thriving. In the other tubs, they have disappeared without a trace. Anyway I’m heartened that some are thriving.