Thanks for sharing this, it's very interesting! Not really sure that it applies to what I was thinking about though, they were treating the plants continuously with the PGRs at higher concentrations. Also the dipngrow doesn't use the same blend, it uses IBA (indole 3 butyric acid), not BAA (6-benzylaminopurine).
The conclusions they came to also were that yes, it alters the size of the plants, which could be a good thing for indoor growing where more compact plants might be required. The effects seemed to differ depending on the genetics tested. One of them responded very well with the others inconclusive, or negatively impacted:
The use of NAA led to a more compact plant architecture with a consistently high inflorescence yield for the genotype KANADA; cannabidiol (CBD) content was not affected. A beneficial effect on the autoflowering genotype (FED) could not be confirmed. Genotypes 0.2x-genetic and FED showed reduced inflorescence yield due to PGR application.
Anyway thanks again for the replies.