Re: In need of a queen? Maybe?
Try reversing the boxes and put a feeder on. Bees build starter strips from the top down much easier if the box is on the bottom. They have no ladder from the broodnest up to the top starter strips the way you have it now, and if your feeder was on top, then it's too far away from the broodnest and no ladder to it either. Another option would be to checkerboard the frames and put a feeder on, but I think I'd tend to go with the first option, reverse the boxes and put a feeder on. This way the broodnest does not get broken up.
20+ years, raise my own queens, feed when needed, I treat but have not perfected varroa management yet.