I think the reason they may be breeding them leafy is these new strains have so much trichrome production on the bud leaf. The mould issue is what brought about the new high tech exhust systems & fans. No matter what you breed, even animals, every improvement in one area sacrifices something in another. I totally agree with you on the fast turn over breeding. Back in the day, we could get F1 hybrids. Pretty uniform, but subsequent breedings threw phenos all over the board, no uniformity. So GOOD breeders would breed them out quite a few generations for an in-breed line for consistency. Now a days, if you want consistency, you have to breed them out yourself, or hunt your ass off for older established strains.
-- I put myself out of the loop for quite a while because I'd stayed with the same strain for over 20 yrs & had no idea what was going on in the new breeding. Between hurricane Sandy & thieft I lost my strain. Boy was I confused when I first hit the seedbanks looking to start over!!!! That's how I ended up on the forums. I have a BS in hort & wasn't about to be outdone in growing ANYTHING! All of this newness has given us old farmers two choices; either keep up with the new, or find seedbanks or friends who have kept the old strains going & available. Growing techniques between the old & the new are very different & don't always interchange well.
-- I'm thinking of starting a new thread, comparing the old to the new. I think we have things to discuss & to bring to the attention of the newer growers/breeders. I'll PM you when I get it started.