Firstly, Welcome!
I can not believe that you did not notice big chunk of red porcelain missing before assy. the handle. It probably happened after you put the handle together. No matter if you over tighten it or defect under mating surface of the handle to cause porcelain pop when tightened... Weber will ship you new lid and handle. Just take few pics and send it in. They won't even question if it is your fault or not.
Second issue about dull Crimson finish is not an issue at all. That is how they come. Just like the Slate on new MT. Weber gave that dull or matted finish to give it's own character or charm. I am really diggin the Slate. They were not meant to have shiny finish.
Store might replace it for you if you did not use it yet, but I just don't understand how after opening the box, looking at the finish of the lid, and putting handle together on it then decide that something is wrong with the Crimson color. Please don't mind my remark. It is just me and I hope I don't offend you. Honestly, I hope you get the green if you are happier with it.
Although I too had some issue with my first kettle aswell, Weber took car of me. I could not be happier.