Permission managment for user profiles


Any user can view and download leads. there should be different profiles for some users. Let’s say Why a graphic designer which I work freelance need to access all leads and also download them?
Also, it is not possible to delete leads from unbounce. I find this quite annoying. It a privacy and security issue. It is not possible to delete information that I collect. Why I can not simply delete leads and store them only on my crm ? Why I have to give permission to designers or translators to full access to view and download leads ?