Group Policy Mapping network drives

We have network drives maped via group policy. I want to change that and just run a simple logon script for all users so that they would get the same netowrk drives. I did not not put in the Network dirves being maped by gorup policy . The previous IT engineer did   . Would they go away by  simply by turning them off and and instead using .bat file in active directory under profiles.  I am doing this since it's simpler to manage for me. Is the Group Policy way a better way of doing this. We have about 80 workstation and 5 mapped drives that users can access based on the groups the belong to. My idea is to map all network drives to all users. That way the users that don't have access to any of the files within the drivers, they will simply get an access denied when they click on them.