These changes would drastically simplify the organization of my library.
1:
The ability to set different speeds/feeds for different materials. Perhaps a dropdown menu.

2:
Add a checkmark field/option to account for chip thinning in the operation's tool/passes tab.
3:
Expand options for tool material/coating in Cutter field.

4:
Add the ability to change the order of tool libraries, right now they are only alphabetical.

5:
Be able to add folders within folders.

6:
Add another IPT field for full slotting.
For example: Niagara cutting tools usually provides different IPT recommendations depending on whether full slotting or using a small stepover.