Space Management for content items
Somehow - if you have content items with many items, the layout becomes very cluttered.
In Kentico we have one thing that works really great to present these input forms better: Categories.
Grouping content elements into categories give context to editors, which may help them to fill in the right information in similar text boxes.
Spacing-wise, image upload fields use way to much real estate o the page. You may consider an option to display smaller thumbnails.