Unless I am reading your request incorrectly I think you were asking for feedback on the esthetic of the design.
Obvious you can decrease the file size of the background images in photoshop or various other image manipulation programs.
I think as far as the design goes you have taken great strides forward from the previous one which is very dated. I like the use of the background image. If I am not mistaken it looks like the wallpaper in some of the photos which is a great way to bring the esthetic of the restaurant in to the design of the site along with all of the photos of the establishment.
I do agree with the previous post pointing out the use of gray. I would explore the suggestion of using a color from the logo for contrast.
One other thing I would suggest is maybe trying the font face from the word creperie in the logo for the headers used in the site. I do like the current headers but it may be worth looking at to bring an aspect of the logo in to the design more.
All in all I think you have done a great job with the new design. It is very clean and easy to navigate. You should be proud of your work.