I've got to say, I don't find the timeline view in Diarium boring, and I've been using it over three years now. In fact I find it really clean and neat, especially with the tags showing and photos for each entry.
I think you have a valid point about the multiple date displays for multiple entries on the same day. It may look cleaner if it was just the one date and then entries below, but it's a very minor aesthetic issue.
You've annotated your example images with "make like this type" - are you talking about fonts? You can choose from a wide range of fonts in the settings menu.