Seeing as how it's common practice to re-use addresses I'd say the users have already decided. Why should you, the 15% mining pool host say otherwise?
Satoshi wrote it into the white paper as an additional privacy measure not as a mandate!!
""As an additional firewall, a new key pair should be used for each transaction to keep them from being linked to a common owner. ""
Who are you to penalize me based on your personal opinion?
Because miners can choose which tx to include in a block based on whatever criteria they decide? If no other pool ever adopts a similar set of rules then at most the impact is 15% slower confirmation times.