I'm little upset because you keep ignoring BSIP 4 (percentage based fee for filled order). Any reasons?
Let me look at USD-BTS market in last 24 hours. It has 14 filled orders with 160k BTS volume. This generated 140 BTS fee (10 BTS per filled order).
If we implement percentage based fee, and assuming the fee rate is 0.1%, plus reducing order creation fee to 1 BTS, the total fee will be 164 BTS (160k * 0.001 + 1 * 14) which is 24% higher than the current fee system.
People won't complain BSIP 4 because this system is already broadly adopted by many exchanges. It will also resolve a problem of relatively higher fees on small traders.
With more fees generated, referrers will be happy as well.