My current wish-list for the generator includes a way to sort the items/ships/whatever by rarity (and maybe silhouette for ships too). For the items, I normally only use alphabetical or price (Though I see how the other options for the items are useful).
For ships I end up wanting to search by Alphabetical > Rarity > Price > Silhouette and I don't get 2 of those, and the category/type are filters that eliminate the usefulness (for me) as sorting methods.
This is just something I would find useful and it in no way is required/demanded just a "this would be cool" kind of thing.
The problem there is a matter of real estate. If I keep adding columns to the grid, it'll be too wide and unwieldy. As for size, you can filter by category and type, so if you want only larger ships, set the category to Capital Ships, or maybe filter by type, such as freighters or starfighters.