Theres not really much of a complication.
I am not sure what the other user is trying to communicate is all that clear .. if they did go and manually ignore some specific packages or files as they indicate .. then I do not understand why that would be necessary.
Just dont use the meta package.
If you did this without some sort of reinstall dance then that means marking the desired ones as installed explicitly along with removing the meta package.
Its not very complicated, and for single-machine systems there really is no reason to keep a bunch of firmware files around that are unneeded. I might even think there could be performance impacts, even if minutely or only affecting minor scenarios like boot time.
Example:
But it is also true that ultimately it is user choice and nothing should be broken by keeping the unneeded packages around. Scared or inexperienced users may safely retain them.