I think what Linux really needs is to embrace some way of getting software outside apt/yum. Having to go through the package managers forces you to be an administrator to install software, and the developer and user have no say in which version of the application you get.

I think Linux distributions should be platforms which developers can develop applications for which they can distribute however they wish. Then users can choose which applications and which versions to install and does not have to go through the AppStore like package management system.

I also think applications should be stand alone. If they need anything outside the platform, these dependencies should be delivered as part of the application.