UI and UX with difficult library management

v3.5 is very difficult to manage libraries compared to v3.2.
In v3.5, the amount of information that can be displayed on the screen at one time has been greatly reduced.
Also, the Filter Pane be moved to the side is very difficult to use.
Anyway, all management feature in v3.5 are hard to use.
v3.5 is very bad as library management software.
Therefore, I am still using v3.2.
Please follow UI and UX that v3.2, iTunes, etc. And I want to have you improve UI and UX of v3.5 for library management.