According to Wikipedia, Plain tobacco packaging, also known as generic, standardized, or homogeneous packaging, refers to packaging that requires the removal of all branding (colors, imagery, corporate logos, and trademarks), permitting manufacturers to print only the brand name in a mandated size, font, and place on the pack, in addition to the health warnings and any other legally mandated information such as toxic constituents and tax-paid stamps. The appearance of all tobacco packs is standardized, including the color of the pack.
Face as individualization
Branding is one of the last remaining proofs that the rights of an individual rest on his power to create, add value, and live on that added value. Anything that contradicts such rights, lowers not only individual freedoms as a fairly abstract concept but hampers life as such. Since life is nothing but power to create and add value.
Branding is also an act of individualization. A brand is namely something that can distinguish itself from all other entities/brands.
Plain tobacco packaging is a most brutal victory of the collectivistic aim to depersonalize individuals into a faceless mass of state subjects. A faceless mass deserves nothing but faceless brands.
Not brands anymore
To be precise, faceless brands are not brands anymore. Without a face, they are only physical entities deprived of all qualities that differentiate humans from animals and the rest of the living world. They are deprived of that part of memes that unify all memes related to tobacco into brand entities. It is a huge step for a state to take control over individuals on the most basic levels of individual rights (and obligations).
It is not a health issue
Arguments that health issues are the main cause for such collectivization only augment such conclusions. To take seriously such an argument means to accept that someone else is living your life and running your health. It means that you have accepted your inferiority as a cognitive, responsible creature that you are unable to take care of your health, your productive resources, and your life. It means you have accepted that a collective takes responsibility and thus all powers over you. Such a collective could be a state, a bunch of NGOs, WHO as a global mob gang, or any local mob gang.