Regarding this new "maker/taker" model, aren't those who provide the liquidity (i.e. those whose orders end up on the books) supposed to get a portion of the fee paid by those who take from the book? This is the first time I've seen a "maker/taker" model described as both parties pay a fee with one just paying a lower fee. This would seem to benefit Bitfinex a lot more than it would benefit traders, and I think it's going to end up creating a price divergence on this platform from other exchanges.
A true maker/taker model (I think, and I'm no expert) should look like this:
Market makers receive 1/2 the fee paid by maker takers.
Market takers pay .3% fee (so Bitfinex receives .15%, and the market maker receives .15%).
This is how you "incentivize" being a market maker.
this!
Thought about something similar but your idea seems to be an even better approach.
That fee structure would be a really incentive for being a market maker.
What´s your opinion Rapha/Giancarlo

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My opinion is that charging a 0.3% fee for a trade is too high.
Bitfinex needs to be the most competitive marketplace in the world for the BTC/USD pair.
The major platforms charge 0.2% for high volume and Bitfinex should not charge more than this.
Staying within the 0.2% range is a must.
Thanks anyway for the suggestion
Giancarlo
Bitfinex Team