We are working everyday to make everything look better and work perfectly.
Regarding the missing dependencies, linux mint has a different library path for your qt5-default as installation may have been done "manually". The solution can be to EXPORT/LINK files path.
Anyways wallet source code will be published soon.
Awesome looking forward to the new releases. Thanks for all your work on this project.
Another way to make this work with more OS's is to compile in QT 5 in such a way to include all depends so others don't run into cant launch the wallet issues. As many different flavors of linux would make it compatible with all. Like the original version does.