In Goodnotes 6, I would say that the icons design (in menu bar) are more confused. Sometimes I hesitate to click on the good one.
This is the case for an icon I often use, "zoom window". Speaking of this one, I liked it better when it was on the left of the menu bar, not least because it disappears when I use Goodnotes in split view on my iPad.
Could you envisage a personal organization of icon placement? With the possibility of removing some of them. (For example, I never use the pointer and could therefore do without it).