After a long test in winter inbetween Peak4 3 m² and Peak5 2,5 m² which was a size I was always waiting for (had also a nice 2,5 m² ConceptAir firefly before)
My final conclusion was:
I now bought another new 3 m² Peak4 and hopefully I will find the time to cut my old preserial Peak4 3 m² down to around 2,5 m² and maybe if I don't sell the Peak5 it could be, that I also try to cut it down to around 2,0 m² but combined with some further "down-up-grades" towards Peak4 (e.g. cutting some fishing lines) to get back a bit more of the unique Peak4 feel, as instant on off depower, instant drift and much more defined and more relaxed feel on the bar.
And don't try to rebuild the Peak5 cutouts in the smaller sizes, they are to many to big and wrongly placed diagonaly in the squares of the ripstop, causing structurell weakness as the coating can't take relevant load, my 2,5 m² had already ripped rips obviously just from final trim in the factory! Not saying all changes in Peak5 are bad, as those are a lot, at minimum 10 basic changes seen, but maybe as the better performance they are more relevant and helpful for the bigger sizes.
So keep and retrim your small Peak4 and have fun with it as long they last, which looks pretty good.