Why does the new inventory UI show less items on Expanded than before?

[Elamys]

With the old expanded inventory you could see more items on the screen at once. (100 items at once vs the 70 items with the new one)
This also led to us having fewer tabs to go through - everything fit into three tabs, unlike now where there are four tabs to go through.

I almost never had to click onto that 2nd tab too. They could surely get the expanded inventory down to 2 tabs.