The burr is actually helpful to the bees as it provides more of a large area for the queen. She easily moves from box to box if there is burr. She hesitates if there's an actual gap.
I'm a little confused here. I was under the impression that you wanted to discourage the queen from moving to other boxes .. and laying eggs in the honey supers, for instance.
I've only been dealing with one hive that is very small for 8 months (It was a cut-out followed by 2 pesticide kills, first one severe), and I still have little knowledge about bee behavior. I'm wondering if you mean the burr comb is helpful in a larger hive with more than one brood box, so she can get to them; or if the queen should be able to easily get to the honey supers as well.
If it's best for her to get to all brood easily but not the honey supers, would it make sense to have different bee space between the super and brood box (and between supers) than between 2 brood boxes ?
It seems like this could be easily accomplished by having different thicknesses of the top bar of the frames (possibly a removable thin piece fitted to the top of the frames on the supers and top brood box .... for "normal" bee space and a little wider bee space between the bottom and upper brood box to encourage burr comb).... Sorry if this is a stupid question.