Would you supercrop the stable/thick stems to the side so that the new inner stems have more space to fill out the plants?
Or should I rather leave the already pretty good structure as it is?
A little supercropping practice never hurt anyone. She looks healthy and stress-free. Why not do a couple of stems and use it as a mini experiment to see the difference it makes to similarly sized/girth stems come harvest time. There is certainly no "need" to do anything; she looks great and ready to burst into stretch.