I would prefer the minimum fee be reduced to 30 Ada because:
- this doesn’t change the shape of the overall reward function
- it revalues min fee to a similar USD amount compared with Shelley staking inception
See @Colin_Edwards post: Minimum Pool Fees (with a brief mention of K changes)
Given how difficult it is to model the effects of such changes, it might be safer to reduce min fee to 30 Ada.