If you haven't seen it, have a look at https://www.manager.io/guides/how-to/expense-fixed-assets. The example illustrates a way to use custom fields to provide additional, useful information in the Fixed Assets listing directly. Personally, I find exporting that listing, including such extra information as depreciation percentages, to more informative than the Fixed Assets Summary. The two in combination surely furnish everything you might need, including a cleaner Fixed Assets Summary. Just my opinion.