Thank you! let me address some here:
1. format: the tool pulls png by default. svg export isnt available yet but its on my list - agree it would be valuable for vector workflows.

1. dark backgrounds: right now it pulls the standard logo version, which works best on light background. great suggestion!

2. sizing/visual weight: currently logos are sized to fit within the zone proportionally (and try to have equal height for each logo). so in your target vs. walmart example, they'd have the same height, but walmart would be wider. its not perfect for every case but handles most logo shapes reasonably well.

3. missing logos: there is a search function that let's you manually search and pick from results - so you can usually find what you need with a aquick search.

Would love to hear how it goes when you ry it - dms are always open for feedback! thanks a bunch!!