If you Browse for an Addon you see only the root. Spoken (WoW Forever Addon) for example.

You only see "Spoken". But after you installed it, you see all the other addons belonging to it. So instead of 1 addon in the list, you got 5. And although 4 are just additions, they are shown always.

I suggest a tree structure, like ihe folder directory structure. You can open and close the tree.

• Spoken

  • Spoken Audio Gossip

  • Spoken Audio Places

  • ....

  • ...

  • ....

• Questie

  • Questie DB

So the additions would be clearly visible as additions, belonging to the "main" addon.

And the list would not get so long and overcrowded.

I have 3 addons, but 12 items in the list.