The sources that I've found for the information I currently have is in Danish and not English, so I don't think it'd be useful to you. What I want to know specifically, I guess, is if there are any other benefits for plants with fractal structures than the ones I've mentioned so far (bigger surface area + easier transportation of fluids). It probably varies between one plant and another, but focusing on the romanesco broccoli would be a good starting point. What I've tried so far is searching on https://www.ncbi.nlm.nih.gov/ although I quickly found out that there wasn't any information relevant to what I'm searching for. Either that or I'm just bad at searching (probably the latter).
In conclusion, what I'm looking for is a conclusive answer as to whether there are any other benefits than the ones I've already mentioned or if that's about it?