Well I've just given your optimiser a damn good workout.
I noticed that my watercolour site had slipped off the first page of Google and decided to put this right. I knew I needed to do some work on it and just kept putting it off because there was so much else I had to get done on other things.
Any way I've made my changes and tested it with your optimiser. It scored 95% which I think is a pretty accurate assessment. Where it does drop points is that some images haven't got ALT tags, but this is just the navigation bar at the top of the page. The are text links at the bottom of each page so this base is covered.
Didn't notice much difference to your optimiser page from before, but I understand that most of your changes are in the background.
When I get chance I will go all through your site and give you my verdict and comments.
Amateur Watercolour Community