A couple of years ago I thought it would be good to join the foundationless ranks. Last year was the first season I used a lot of foundationless frames. Some brood boxes were given to the hives, totally foundationless. (I was expanding, lacked comb) Other hives got foundation... some I was able to put foundationless between drawn comb.
This past weekend was the first weekend I really got into the hives and did thorough inspections, as I made splits and requeened. I am seriously rethinking foundationless.
Not because some of the foundationless frames were interlaced...I take responsibility for some of the more egregious disasters in the brood boxes. But even when the bees built straight foundationless comb, end to end and top to bottom, the drone cells! I have NEVER see so many drones in my colonies! I know that the bees will only build what they need... but my goodness! Now I don't mind that they tear up perfectly good foundation and build drone comb...the number of drone cells that way doesn't hold a candle to the quantity in my foundationless colonies.
Just my observation, for what it's worth.