Hi im new to D&DBeyond (new to D&D for that matter). 

My question is how does UA content that gets removed effect characters using that content?

I have a character that is using alot of the UA content that will be in the new Ebbrron book so im guessing that will superseed the UA content.

Will my character be unusable in dndbeyond if I dont buy the new book right away?

Will it automaticly apply the changes or will I need to do it manualy?

Will I need to make a new character effectively?

Thanks for taking the time to help.

Any ua content in an existing character will remain available and your character will still work. 

If you remove that content, you won't be able to re-add it. 

When the official version comes out, you will need to rebuild your character using that