Currently here we strip down all the pdb files and transactions log files.

my first idea would be to strip mysql-test, it has a lot of files, that nobody really needs.

we need pdb in some form, to be able to debug customers problems. We can either move them to additional package - but this needs some support from our infrastructure, thus maybe not right now.

stripping transaction logs - they take only 500K in compressed form, i.e 0.25% of current package size, does not help much, does it?

That would already help yes , I guess a Minimal package ( without pdb ? ) and a default full package would be good