. I have to make you a mod first, wait a minute.
I think I can allow users to turn off comments for their own gallery, but not the rating. This is a global setting. But I will have a closer look, maybe there's an add-on to make it possible.
Regarding the old thumbnail pages: Right now the thumbnails are very big. This has the advantage you can look through most pictures without clicking on them. But I understand why you prefer the smaller thumbnails. Perhaps it's best to wait till all moderators have registered and then we will have a vote on this issue. Small thumbnails vs big thumbnails.
There are "new comments" and "new pictures" links in the gallery. I can make them bigger and put it at a better place, that's no problem.
Comments or even guestbooks on profiles can be added if you want this. There's an add-on. But this might be something everbody will have then, so be sure if you want it.
There are several design changes I want to make in the gallery... for example stars for the rating. And you can decide if you prefer 10 or 5 (or 100