Could be helpful to add such function as moving uploaded image from attachments to albums. Because I can set attached image max size in kb, and it will be auto resized. (as you can remember, in albums thereis no auto resize function )

 

This is a very complicated way to resize gallery images but I agree with your concern to auto resize in gallery. 

Check with @stoo2000 for a private file for Kraken image compression that can help.