There have been several opinions expressed that I would like to address:
Opinion 1. If we don't increase the taker fee, then we won't shift the market and we can still incentivise market making by reducing the maker fee up the opposite of the taker fee.
If I offered everyone on this forum $0.01 to visit me in my office every day you could claim that I am incentivising an increase in visitors. If my goal is to get 1000 visitors per day will such an incentive program make any meaningful difference? Of course not, the cost of traveling to see me is greater than $0.01. On the other hand, if I was handing out Cryptonomex stock to everyone who came to see me then I will probably get a lot of people buying airplane tickets to come visit me. There is a non-linear curve on the incentive scale. Below a certain point it makes almost no difference, above a certain point there would be a mob outside my office.
If we are going to implement something it has to be "big enough" to have a meaningful impact on liquidity, not just theoretically incentivise it. To have a meaningful impact it has to significantly offset the volatility risk faced by liquidity providers. In other words, the reward should be equal to the average volatility during the average period a market maker takes to turn over their inventory. This volatility risk is what we must overcome. Throwing a few pennies at market makers and saying, "hey take a big risk and we will increase your revenue by 0.2%" and they will say, thanks but no thanks.

Opinion 2. We should simply encourage liquidity by diluting BTS
99% of assets on BitShares are user issued assets. Companies like Open Ledger want to incentivise liquidity in their UIA and will need tools to do so. Surely we wouldn't want to dilute BTS to provide liquidity in every UIA? If we are going to code a solution to improve things for some BTS assets, we should do so for all UIA assets.
As you can see in this thread, diluting BTS is not an option because it has no market feedback via price indicators.
So rather than viewing this as a tool for BTS, view this as a tool for businesses built on BitShares. These are the businesses that need to self-fund their own liquidity from their own future profits.