This has been an issue for a LONG time now. In the admin section and in the plugins settings page, the tabs across the top. For me, the inactive tabs are light grey with white text. You can't read the text! As I haven't done anything to customize the plugin and did a fresh install, then it is not on my end. This is easily fixed by modifying the plugin's css, but users shouldn't have to manually do that. That should be a non issue out of the box.
Finally, it would be great to have shortcodes and template codes so we can make our own templates to better match our website. To have things displayed where we want them to be. Not only will this help to make things look great in our themes, but in printable versions as well. More user control basically. Right now, for me to make things look the way they need to on my site and to give it the clean, professional look that clients like, I have to manually edit the theme every single time there is an update. I'd gladly pay for a pro version that gave me more control over how things look.