Asset Bundles and Google Play Asset Delivery

Hi there,

I planned to release my game in august. I read that OBB-files won't be supported anymore in august.
My game/apk has about 300mb. I used OBB before and it worked super easy.
Now I'm trying to use this "play asset delivery" were I have to make asset bundles.
I made bundles for example for the skymaps, the audio/background music and all my scenes except the opening and main menu.
The aab-file now is double the size (about 600mb) of the original apk?!
Should I delete alle the assets that have been packed in bundles?
But what if I want to edit a scene for example? Then the scene is deleted and I can't access it anymore?
I don't see any benefit in this system, except that you'll loose all your bundled asset-files or double your build-size.
Is there a guide that shows how to make any sense out of this working progress?

Thank you