We are migrating all of our products (1500 active, 10000 total ) to a PIM system, and Plytix is a contender in our research.

There are a couple of things that we would love to have:
Global Computed attributes, we would love the ability to generate entire product names from other attributes like Manufacturer and Model.

The ability to show Attribute Groups to the Product Categories that they are assigned to and hide them from others to clean up the entry fields.
For example; Paper Products don't need the attributes from Chemical Products

Remove the extra click to edit a field, that extra click adds up when you have 1500 active products.