Piling on here. The new inventory display is a significant step backward from the old display (100 items visible vs. 70), and the Key Item tabs feel pointless. Give me an "Expanded" view that shows all four panes, preferably with Crystals attached as well.
As an aside, is it really so much of a strain to add ten more spaces so we're at an even 150? 140 is an exceedingly strange number, and 150 would have allowed a very nice "Expanded" view showing six 5x5 inventory panes, a single pane of Key Items, and a pane for the crystals. It would have been glorious.