Dark mode is a must. Having a complete library with categories is a must as well imo. Something that I think would be cool and fun would be the randomizer - kind of like how a dating site looks (Tinder for example lol) show 1 plugin with visuals and breakdown/description and then you can click next or download that one. Would be fun and entertaining especially for people that are wanting to have fun in their DAW - ex. A 3 free vat challenge where their whole track only can be made with 3 free vst’s and they can use that randomizer to choose them. You could create an actual challenge on social media for this and increase user base if content goes well! People like new and exciting/fun things to try and I think that could go very well and excite people’s attention to what you are building <3

Vst challenge*