Thanks for the extra feedback a.l.e.
You've made some very valid points.
As for the dark theme, that's one of those things that is totally subjective. Some people like dark while others like light. Sometimes it depends on the subject matter but, personally, I think the dark theme looks better for Scribus because it helps as a contrast to the images. I don't think it would be a huge amount of work to change it but I think it can be left as it currently is unless a lot of people have a major problem with it.
Can you explain what you mean about a "download icon" please? (A link to a site that shows what you mean would help.) Do you just mean adding one of those "down arrow" icons to the button as can be seen on the GIMP home page, or something else?
I agree that the image under the "About Scribus" could do with some work. It needs to be something that shows Scribus in action but I agree that the grid should not be shown. If anyone has a really good screenshot, of Scribus being used to make something nice, we can look at using that instead. (And yes, the name of the file should probably change too.)
I agree that the Arrange Pages dialog is not the best one to show for that section. Maybe a combination of Align/Distribute with the Layers dialog would be better. It needs to be looked at.
A quick look at (link removed) shows that people have posted something in most of the forums this year. Can it really be that "dead"?
I agree that the link to the IRC would be a useful addition.
The financial donation button can be easily removed. It can be added later if necessary.
I've created GitHub issues for the relevant topics above.
P.S. You mentioned that it's about the small details now and I totally agree. We need to make sure that the site looks great and works really well. If the site has problems then people will think that the application has problems. I.e. "If they can't be bothered to get the site right then what does that say about the software?"