Well, it looks nice, but it's a nightmare to navigate.

It needs:
1. A search function: (Lodestone and game) As it stands, the only way to find the minion you're looking for is to mouse over each icon and read the tooltip. Once you start getting over 100, this becomes extremely cumbersome. It's not even in any logical order. At least show them by name, alphabetically. That's what localization is for, right?
2. Filters: (Lodestone and game) Give us a filter to show All/Have/Need, airborne/terrestrial (for mounts)
3. Links: (Lodestone only) make the icons image links to the additional information (i.e. how it can be obtained).

Players are obsessive about collecting mounts and minions. Don't make it more difficult than it needs to be. These are all no-brainer features that should be standard in any kind of list interface design.